Interstitial Journaling: A Few Lines Between Tasks.

The practice of writing a brief timestamped note in the gaps between tasks: what you just finished, how it went, and what you intend to do next. Entries are a few sentences long and take under a minute. The technique turns context switches into deliberate resets and produces an honest time log as a byproduct.

Tony Stubblebine, who introduced the technique in 2017. His framing combined journaling and task management into one small habit performed in the interstices of the day, with defusing procrastination as one of its central purposes: writing the next step concretely, at the moment of transition, makes the step easier to start.

Three beats, in a few sentences: what you just finished ("wrapped the pricing draft"), how it went ("ran long, started without the numbers"), and what you intend next ("reread section two and fix the intro"). Plus a timestamp. There is no template beyond that, and entries should stay short enough to fit comfortably inside a gap between tasks.

A to-do list directs work but never reflects on it; time tracking records durations but not judgment. An interstitial entry does a little of both: it closes the finished task with an honest sentence about how it went, names the next action concretely, and carries a timestamp. The accumulated entries work as a time log, but one annotated with intention and assessment rather than bare start and stop times.

Whenever tasks change, and only then. A fragmented day might produce a dozen entries; a deep-work day might produce three, written at the block boundaries. There is no quota and no schedule. Missed gaps are normal and cost nothing; the next entry is worth writing whenever the next gap arrives, regardless of how many were skipped before it.

Nothing bad, and this is worth internalizing. Interstitial journaling has no streak: each entry pays for itself at the moment of writing by resetting the switch and lowering the next task's activation energy. A week of missed entries does not devalue the entries that exist. Restart with the next gap, guilt-free. People who treat holes in the log as failure tend to quit; people who treat the log as opportunistic tend to keep it for years.

The one closest to your gaps. The technique is tool-agnostic and works on paper; capture friction, not features, is what decides whether the habit survives. If you run it digitally, a system-wide capture shortcut matters more than anything else. In Mindly, ⌘M makes an entry cost about five seconds, AI tags entries by project automatically, and semantic search lets you query the log later in plain language.