CC Mantra / Ritual as Distinct from Routine
Marking the moment you arrive and the moment you stop
Transitions are the places where a small deliberate action does the most work.
The hardest parts of a day are usually not the middles but the edges: starting, stopping, moving from one mode to another. Left unmarked, these edges blur, and the blurring is expensive. Work leaks into the evening, the evening never quite begins, arriving home takes an hour to actually happen. A marker is a small repeated action placed at the edge whose only job is to say clearly that one thing has ended and another has started. Changing shoes. Closing the laptop and putting it somewhere out of sight. A short walk around the block that goes nowhere.
The action itself does not need to be meaningful in any deep sense, and it usually should not be complicated. What matters is that it is consistent, that it is unambiguous, and that it is reserved for that transition rather than done at random points during the day. A marker that also occurs mid afternoon cannot mark anything. The reason these work is that the body is a much better signal for the mind than an announcement is, and the mind takes the hint from the body far more readily than the reverse.
Endings deserve more attention than beginnings, because beginnings tend to be prompted by the world while endings must be chosen. Almost nothing external tells you that work is finished. Without a marker, the day simply degrades until you are too tired to continue, which is a poor definition of finishing. A deliberate closing action, however small, converts a fade into an edge, and an edge is what makes the following hours available for something other than residue.