My hobbies include maintaining my physical and mental health. It's a full-time job. Yoga definitely helps for both of them. I'm a big fan of relaxing and not having a schedule. That's my best way to keep from going crazy.
At the end of the day sleep is a barometer of your emotional health. And so if you're not in the right place where you need to be then you're going to have voices keeping you up at night because you have to work through those issues.