Take one of the gaps you already have, the commute or the walk or the shower, and use it to ask what is coming up this week and what might be slipping. No new tool, no new app, just the question.

Notice how often a forgotten job turns up in the shower, or halfway up a flight of stairs. That is not coincidence: when nothing is holding your attention, the things you meant to do float up.

For most of childhood somebody else held the diary. Parents remember the dentist, the kit, the letter that needs signing, and then one day nobody is doing that for you and the whole job is yours.

A thought you have in the car about something to say at home is worth nothing until the person is actually there in front of you. Cues have to sit where the action becomes possible, not where you happened to think of it.