Very good thread - I have found most if not all of these things helpful too.

Getting out of the city and staying with my significant other in the suburbs has helped a lot: quieter environment, more green space, more wildlife, no stairs, more stable routine, daily support from my girlfriend (it's mutual!).

Also: I have been gradually building up both my physical ability (through incrementally longer walks and various chores) and mental ability (doing Rosetta Stone and other language exercises in my second language (proceeding step by step starting with level 1, even though I'm already quite fluent), doing crosswords and playing Scrabble, writing short posts to my favourite websites/blogs.

I'm talking about a painstaking progression over the course of many months, but these things have really helped with my recovery.