Most task managers treat completion as disposal: the item is done, so it vanishes. But a completed task is evidence—of what you did, when, for whom, and why. Deleting it erases a part of your history that is expensive to reconstruct and impossible to fake later.
A done list is a record of your work
‘What did I actually do last month?’ is a surprisingly hard question when finished work disappears. A preserved done list answers it directly: for performance reviews, invoices, status reports, and the quieter question of where your time really went.
You do not need to write a journal about your work if the work itself leaves a dated trail.
Completed tasks carry decision context
A task that came from a note keeps a link to the situation that created it: the meeting, the voice memo, the message. Months later, that link explains not just that something was done, but what problem it was solving and who asked for it.
- Keep the connection between a task and its source note.
- Record completion dates, not just completion.
- Let a closed task remain findable by meaning, like any other note.
When old tasks answer new questions
When did we last renew that contract? How long did the visa process actually take? Did I already follow up with that clinic? These questions are answered by completed tasks far more often than by notes, because tasks mark the moments when intention became action.
Archive out of sight, not out of memory
The done list should not clutter today’s view. Good systems move completed items out of the way automatically while keeping them searchable. Completion should be one tap—and archiving should never mean deletion.
Treat completion as a state change, not a shredder. A searchable history of finished tasks is a diary you wrote without trying.