Sewing is a good idea, as others have suggested. It distracts you and also helps you improve your drawing skills without you even noticing it
I also find playing a musical instrument relaxing. It could be any or you could learn to play one and play just for yourself (not like to become a musician or do presentations).
As others have said as well, sculpting is a good idea. You can try sculpting with paper clay, it's fun and you improve your drawing skills as well.