The alarm that's set at the wrong moment
Most alarms mark the moment something is supposed to happen: the meeting starts now, it's time to leave now. That's the least useful moment to be told, because by then there's no room left to prepare — you're just supposed to switch, instantly, with no runway.
A warning set ten minutes earlier does something an on-the-dot alarm can't: it gives the disengage-and-reengage process, which is genuinely effortful, somewhere to happen before the deadline arrives instead of at it.
Why ten minutes, specifically
Ten minutes is long enough to actually wind down whatever you're doing — save the work, finish the sentence, put the tool down — without being so long that it gets lost in the background and stops functioning as a signal at all. Shorter warnings don't leave enough room to disengage. Longer ones tend to get mentally filed as "not yet" and lose their urgency by the time they matter.
What to do with the ten minutes
The warning isn't just advance notice — it's the start of a small, repeatable ritual:
- Acknowledge it immediately, out loud if that helps, rather than letting it register passively in the background.
- Identify the actual stopping point for what you're doing right now — not "wrap up eventually," but a specific line or task to finish at.
- Do one small physical action that marks the shift — standing up, closing a tab, moving to a different spot — something that gives the brain a concrete signal that a change is underway, not just impending.
Where this fits into a bigger system
This one habit works on its own, without needing any of the rest of a transition system built around it. If you only take one thing from thinking about transitions at all, it's this: move your alarms earlier. A ten-minute warning turns a jarring, all-at-once switch into a short runway you actually get to use — and that difference compounds across every transition in a day.