I rarely set off on foot or bike just for the sake of doing it, but I enjoy a walk or ride normally and my mind flows through lots of subjects, and solve lots of problems - only to forget it all when I arrive at my destination.
Tonight I went to pilates (being lazy and late I had a lift up the hill), then on my way home, I suddenly remembered there was a path I hadn't explored so diverted to explore that. I discovered it was slippery after the rain, but nice walking through the field of rape. A pleasant 2 miles!