I feel a bit better. I just had to go out, and it involved a fair bit of walking and it’s true that this does clear the head somewhat. I’d been a total cabbage all week so far. Activity is a great tonic; inactivity is a terrible rut.
I also have to get over my bitterness, really, about not successfully pursuing my writing career to any great degree. I still carry hopes of reviving this ambition, but right now it’s obvious that I must put it on hold and look for something more realistic. If only to keep my mind occupied.