Every few weeks, I go for a type of a run that I describe as either "restorative" (if we are being formal) or "lollygagging" (if we are not). (The last time I wrote about this here was in mid-December.) I head out on a shorter route necessary for the window of time I have, take my camera with me and do things like tromp through knee-deep snow to look at a frozen river or get closer to a shadow that catches my eye. I give myself a few minutes to wander, without a schedule.
It's easy, easy to enjoy this wandering in the summer - but I think it's equally important (if not more so) to make time for it in the winter.