The walk back
It's popular to say good ideas come on walks, but I think the nature of the walk matters. If the route is too familiar my body is on auto-pilot and I’m too in my head. If it’s a novel or challenging route, I’m completely attentive and in my body, not thinking grand thoughts. But the good ideas come somewhere in the middle, like on the walk back from a hike (not a loop), because it’s both familiar and new.