I’d add a hard cap at the start: for the first two weeks stop at 10 minutes even if you feel great. It prevents the day-two soreness spiral and leaves you hungry to come back. Anchor it to a cue you already do (after coffee), and tick a box on a calendar so the win is obvious.
I do the "travel clock" exit: "Hey, I've got a hard stop at 3, let's pick it up tomorrow," while zipping my bag like a countdown timer. Learned that after I once lost my passport, luggage, and dignity in the same week—now I over-prepare my goodbyes. If they linger, I walk and talk toward the door; the feet end the meeting for you.
