I've recently started learning to knit. I find this to be very relaxing and it helps me to releive stress. It's also great because I can learn a hobby to make useful things. I would really like to learn to knit and stuff toys for my baby when he's a bit older.
Knitting also helps me because I stim a lot with my hands. This, in and of itself, is not a problem, except for the fact that one of the stims I have does cause occasional injury to my hands. Knitting is a great replacement for this stim that serves a useful purpose, as well as stress-relief.
Crochet is an alternative if the sharp looking needles make you nervous.
Just wanted to share that in case anyone else wants to try it. Hope you all have a Happy New Year!