Odd that there's so much woodworking in this thread already, but a few years ago I took up spoon carving and it's a very pleasant counterpart to being on a keyboard all day.

I think in general I'd recommend finding a creative hobby that's more tactile, physical, etc. Something that doesn't involve looking at a screen. Maybe that's carving, maybe that's sewing, doesn't really matter as long as you're using your hands to create a physical object.