Accept the things you can't change. If you can and want to change them do it.

Let go of the people who are holding you down. If you considered them, you already know who these people are.

Blast your faourite upbeat song and sing at the top of your lungs, dancing as you go.

Go for run. A nice, long run. Run until you feel good; at very least, you'll be tired enough that the feelings will seem less major