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.
Someone thought excersize would be useful for me I'm going tootivate myself into that again.