Put on your LBD and high heels and go dancing.
Trying to make the negative into a positive. I don't know what you're going through right now, but when I'm down I try to learn about myself through whatever is going wrong. In example, when I get rejected when I talk to someone, I'll think something like "yes, that awful thing happened, but now I know that those people are ********."
I go buy a car when I'm feeling down.
Spend some time with friends and family!
Pot. It just became legal in Colorado.