How to be happy?

When you're purposely trying to be happy or cheerful, but just can't seem to acheive it at the moment, do something crazy. Turn your favorite music up loud and do a stupid dance to it. Talk to yourself in the mirror. Try a new food. Rearrange your room in a weird way. Write a funny or inspiring quote on your mirror/wall/locker. Scream as loud as you can (warn your family first!). Bounce up and down, jump all around. Go outside and turn the hose on yourself, if it's a hot day. It's stupid, crazy, weird stuff like that that seems pointless, but could actually lift your mood after you do it, just because you're glad you did it.