12th: I wrote today (edits to the last section, including an explanation of the canon divergence, which I'd been hand-waving a bit too much).

I can't write to music, and I don't craft (because I have limited arm capacity, and I need it all for typing) -- if I get stuck, I do dishes, take a bath, go for a walk, etc. Or set my brain the task of solving the problem before I go to bed and hope there'll be a magical solution awaiting me when I wake up. :-)