I find that yoga, and exercise in general helps. When I do this kick-boxing class I have, it's so crazy and hard, that I feel nothing but good at the end. Even if I had been in a bad mood, or stressed, it makes you use your body for good, and loosens everything up. I would sign up for some sort of class, if you can, even if it's just an hour a couple times a week. It really helps you to feel good.