Baking, cooking, reading, writing, singing, guitar-playing, and weight-lifting are my main other hobbies - all of which I seem to be doing much less of ever since I got addicted to knitting.
In terms of other crafts, I used to cross-stitch and I recently learned embroidery, but I don't do either one very much. I am currently gearing up to relearn how to sew.
And pre-children, hiking and camping were major hobbies. I miss them and hope to get back out there once I feel able to manage two little boys in the woods!
Oh, and I also spend an inordinate amount of time online.