I find that having long-term projects to work on keeps my head above water. Over a mid-length period (e.g., a month) I have successes in weight training and my music skills. Also I find some gratification in achieving other shorter-term tasks, even things I don't really want to do. Clean a room, do some laundry, bake a cake.
Also helps that I'm single, life is a lot simpler this way. My kid is out of town so this weekend is about as carefree as it gets (pretty refreshing actually to be able to slam around barbells at 5 AM without worrying about waking anyone up).
Cliffs version: it's gratifying to make progress on things and if you have enough good stuff going in life it's harder for the bad stuff to drag you down, so stay busy.