Interstitial Journaling: A Three Line Log Between Tasks, and How to Say It in 15 Seconds

By Owen Calloway Published October 18, 2026 13 min read

Interstitial journaling is the habit of writing a short log entry every time you switch tasks. Each entry notes the time, what you just finished, and what you will do next. Tony Stubblebine described the method in 2017, and it works on paper, in a notes app, or spoken out loud in about 15 seconds.

The whole method is three lines long, yet the habit is easy to drop. The writing is not the hard part. Getting to the journal is.

This guide covers the method, a full sample day of entries, and a spoken version that works like a brain dump by talking, cut down to one breath.

What interstitial journaling is, and where it came from

The original three lines

Tony Stubblebine wrote up the idea in a 2017 post for Better Humans, a publication on Medium. "Interstitial" means "in the gaps": instead of a to-do list alone, you keep one running journal that is part to-do list, part notes and part time log, and add to it between tasks.

Each entry has three parts:

The time. The clock time, at the start of the entry.
What you just did. One line on the task you are leaving, and where you left it.
What you will do next. One line on the task you are starting now.

Anne-Laure Le Cunff made the method widely known through her Ness Labs explainer. Some people add a word on mood or energy, but the three core lines carry the method.

What a day of entries looks like

Most interstitial journaling examples online stop after a few lines. Here is a full day for a product manager, one or two sentences per entry:

09:12 Standup done. Next: review the billing fix PR.
10:40 PR reviewed, two comments, waiting on Sam. Next: client email about the late invoice.
11:05 Invoice email sent, finance copied. Next: Q4 roadmap draft until lunch.
12:30 Roadmap half done, stuck on the pricing section. Lunch. Next: design review at 1.
13:50 Design review done, two onboarding changes agreed. Next: write them up as tickets.
14:20 Tickets written. A support escalation just came in. Next: the escalation.
15:15 Escalation answered, blocked on logs from the infra team. Next: roadmap pricing section.
16:30 Pricing section done. Next: 1:1 with Priya, then inbox.
16:55 Wrapping up. First thing tomorrow: Sam's reply, then the infra logs.

Interstitial journaling timeline: a work day of task blocks with a small three line log card in every gap — One work day as a single track: each block is a task, and each card in a gap is one entry.

The timestamps show that the PR review took 90 minutes, not the 20 you planned. The "waiting on" and "blocked" lines are tomorrow's blockers, already written down.

Why interstitial journaling helps

The case rests on one well-studied problem: leaving a task before it is finished.

Attention residue. In a 2009 study in Organizational Behavior and Human Decision Processes, Sophie Leroy found that when people switch away from an unfinished task, part of their attention stays on it, and the next task suffers. She called it attention residue.
A plan to resume. In four studies in Organization Science in 2018, Leroy and Theresa Glomb found that interrupted people who made a brief ready-to-resume plan showed less attention residue. Their work on the interrupting task did not suffer either.
A free time log. Every entry starts with the time, so the journal shows where the day went.

Be clear about what was tested: a short plan made at an interruption, not a journaling habit. The "done" and "next" lines apply the same move at every switch, a reasonable bet rather than a proven result.

A walkthrough of the method from Growth Quest, under four minutes.

Why the habit is hard to keep

Here is the catch fans rarely spell out. Opening the journal is itself a task switch, the very thing the method is meant to tame.

Do the friction math. Say you switch tasks 8 times a day, and each entry takes 4 steps: find the journal, click into it, type a few sentences, and find your way back. That is 32 extra actions a day, each one a small switch of its own.

A keyboard first way to switch between apps cuts the finding and the returning down to a keystroke each. The typing step is the one that stays slow.

As general research figures, not product benchmarks: large typing tests put the average typing speed near 52 words per minute, while everyday speech runs near 150, per the National Center for Voice and Speech. A 15 second spoken entry is roughly 35 to 40 words, about 45 seconds of typing at 52 words per minute.

It is the same gap behind doing a brain dump out loud. To see how many words fit in 15 seconds, try the Time limit to word budget mode of this speech time calculator.

Two lanes: a typed journal entry loops through many search, click, type and return steps, a spoken one takes one short step — The friction math: typing means a detour to the journal and back at every switch; speaking is one short step.

So here is the rule. Start with three triggers a day, not every switch, and make each entry cheap enough to survive your busiest day.

The 15 second spoken version

If typing is the slow step, say the entry instead: one breath, three parts, about 15 seconds.

The spoken interstitial journaling template

The time. "Ten forty."
Done. What you just finished, and where you left it.
Next. What you are starting now.
Optional flag. One word for a blocker or your energy, such as "blocked" or "tired".

Here are three entries as you would say them, and roughly how they read once they land as punctuated text:

Said: "ten forty done PR reviewed waiting on Sam next the late invoice email." Reads: Ten forty. Done, PR reviewed, waiting on Sam. Next, the late invoice email.
Said: "three fifteen done escalation answered blocked on infra logs next the pricing section." Reads: Three fifteen. Done, escalation answered, blocked on infra logs. Next, the pricing section.
Said: "four fifty five wrapping up next tomorrow Sam's reply energy low." Reads: Four fifty five. Wrapping up. Next, tomorrow, Sam's reply. Energy low.

Interstitial journaling template: a 15 second voice clip in three parts, time, done and next, flowing into three log lines — The spoken template: one short clip in three parts, each becoming one line of the log.

What counts as a switch

A switch is any natural break: a meeting ends, a pull request is merged or reviewed, or you are about to open Slack or email. Coming back from lunch, starting a focus block and being interrupted count too, and after an interruption the entry is still the time, done and next.

Pick three to start. "Meeting ends", "back from lunch" and "before a focus block" are easy picks, because each already feels like a pause.

Option 1: one running log note per day

This fits a full day best. With VoiceSnap Pro, create a note for the day, such as "Log, Thursday", right-click it, and choose Open Note in New Window. Park that window beside your work.

At each switch, click the log window and hold the voice notes shortcut (Right Command on Mac, Right Ctrl on Windows). Check that the status pill reads Adding to, followed by the note's title. Or press Add by voice in that window: once to start, again to stop.

If your work app is in front, the shortcut starts a new note instead, so this option costs one click per entry. Each entry goes on the end of the note, and its recording joins the others (up to 50 per note), so the day plays back as one track.

Nothing stamps the time into the text, so say it first. If a word comes out wrong, play the recording to check it, or re-transcribe the note.

Option 2: dictate into the daily note you already keep

If you keep a daily note in Obsidian, Logseq, Notion or a text file, log there. Put the cursor at the end of today's note, hold the dictation shortcut (Right Option on Mac, Right Alt on Windows by default), speak, and release. Punctuated text is typed at the cursor, as talk to text on your computer does in any app.

This is plain dictation, not a plugin, so it works the same in an Obsidian daily note or when dictating into a Notion page. With Keep dictation history on (the default), a text copy of each dictation also stays on that computer. The trade-off: you still switch to the daily note's window for every entry.

Option 3: no window switch at all

This is the only route with zero switching. From whatever app you are in, hold the voice notes shortcut, or press Control+Option+N (Ctrl+Alt+N on Windows) for hands-free and press it again to stop.

Each voice-note entry becomes its own note, grouped under Today in the notes list. The trade-off is many small notes instead of one log. Creating and organizing notes has no free-plan cap. Voice-note transcription shares the one-time 5,000-word allowance with dictation; Pro is $9 a month when you need unlimited transcription and manual AI actions, subject to fair use.

End of day: turn the raw log into a standup in two minutes

One short pass at the end of the day turns the raw log into the update someone is waiting for:

Yesterday: a short summary of the "done" lines.
Today: the last "next" of the day.
Blockers: every entry that says "waiting on" or "blocked".

In the sample day, today is Sam's reply and the infra logs, and the blockers are the two waiting and blocked entries. Paste it into the Slack thread or the standup doc.

If your log is a VoiceSnap Pro note, three AI actions do most of the sorting:

Run Summarize and choose Summarize into a new note, so the raw log stays as it is.
Run Turn into bullet points on that new note. It replaces the text it runs on, and Undo or version history brings it back.
Run Extract action items on the log to add the to-dos you said out loud (each "next") below it, with who and when if you said them.

A stack of daily work log entries sorted into three trays, done, next and blocked, that feed one standup summary — From log to standup: done lines become yesterday, the last next becomes today, waiting or blocked entries become blockers.

Once a week, search for "waiting on", "blocked" or a client's name as exact phrases, with the last 7 days filter. It is the trick behind a searchable commonplace book: you find entries by the words you used. For an archive outside the app, Export Notes saves notes as Markdown files.

Interstitial journal, daily note, work journal: how they fit together

These practices overlap, so here is how they differ:

Practice	When	Length	Who reads it	What it is for
Interstitial journal	At every task switch	1 to 3 short lines	You	Closing one task and starting the next
Daily note (Obsidian or Logseq style)	All day, one page per date	Open-ended	You	A home for the day's notes, links and log
Work journal or work log	End of day or week	A short summary	You, your manager, your review	A record of what you shipped and decided
End of day summary	Once, at close	3 to 5 bullets	Your team	Standup or status update
Brain dump	When your head is full	One long unload	You	Clearing everything at once
Bullet journal daily log	Through the day, on paper	Short bulleted notes	You	Rapid logging of tasks, events and notes

Interstitial journaling and a bullet journal combine well. The interstitial entries add the time and a "next" line to the bullet journal's rapid logging.

Daily notes: the log is a section inside them

If you keep daily notes, you do not need a second tool. Obsidian's Daily notes plugin, for example, opens one note per date. Add a "Log" heading to the template and let the entries pile up under it.

Work journal and daily work log: keep two layers

Guides disagree on whether an interstitial journal should double as a work log. Several warn against making it a performance log, and they have a point: "lost an hour to email" only helps if you can write it honestly.

The fix is two layers. The raw entries stay private and honest. The summary you build from them is the part you share, and it is your work log.

Two layers of a work journal: many private raw log entries behind a padlock feed one shared summary card above — Two layers: private raw entries underneath, and the shared summary that becomes your work log.

Mistakes that kill a spoken log

Rambling past 15 seconds. One breath, three parts. If it needs more, it is a note, not a log line.
Polishing entries. Nobody grades the raw log. Leave the stumbles in.
Skipping the "next". That line is what helps you resume. Without it, the log is just a diary.
Logging only on good days. Messy days are where the log shows where the time went.
Never reviewing. A log nobody reads has no payoff. The two minute end of day pass is what makes it stick.
Speaking client details in an open office. Step away, or type that one entry.

A note on privacy. Voice notes keep their recordings, and Keep recordings can be set to Forever (the default), 30 days or Don't keep; the text stays either way. Dictation audio is discarded after transcription, as the privacy and data page explains.

For an entry you would rather not store in your account, use Option 2 and dictate into a file on your own computer. The audio is transcribed, then discarded. With Clean up dictation on (the default), the transcript is also sent to be cleaned up before it is typed, and VoiceSnap's server keeps no copy. The text then stays local.

Frequently Asked Questions

How do you do interstitial journaling?

At each task switch, write or say the time, what you just finished, and what you will do next. Start today with three triggers, such as the end of a meeting, and read the log back at the end of the day.

Who created interstitial journaling?

Tony Stubblebine described it in a 2017 post for Better Humans, a publication on Medium. Anne-Laure Le Cunff of Ness Labs later made it widely known.

How long should an interstitial journal entry be?

One to three short sentences, or about 15 seconds if you say it. Long entries make the habit expensive, and expensive habits get dropped.

Is there an interstitial journaling template?

Yes: the time, "done", "next", and an optional one word flag such as "blocked" or "tired". Spoken, it sounds like "Ten forty. Done, PR reviewed, waiting on Sam. Next, the invoice email."

What is the best interstitial journaling app?

Whatever is quickest to reach from wherever you work: paper, a text file, voice notes, or an Obsidian or Notion daily note. In Obsidian or Notion, keep the log under a heading and type or dictate at the cursor; no plugin is needed.

Start at your next switch

You do not need a setup day. At your next task switch, note the time, what you finished and what is next. Do it three times today, and read the log before you log off.

If you would rather say each voice-note entry than type it, try VoiceSnap Pro. Every new account can try every feature free with 5,000 transcribed words and 50 manual AI actions, given once with no expiry and no card required. Creating, editing and organizing notes has no free-plan cap. Pro is $9 a month for unlimited transcription and manual AI actions, subject to fair use, on up to 3 devices. Download free for Mac or Windows. Automatic AI titles, tags and reminders set by voice do not count as manual AI actions.