Listen to a "calming" meditation tape/cd/video. Not a fan of self-harm or worse, becoming a Darwin Award winner because I let my emotions turn into an action that basically kills me. Even if it doesn't, breaking stuff isn't really carthatic and ultimately makes things worse. You're now down one mirror, mase, or cell phone.
What is worse:
Eating half an apple then finding out you ate at least half a worm or grub buried inside?
Eating half an apple then finding out you ate at least half a worm or grub buried inside AND find out that you enjoyed the worm so much, you rather never eat apples again and only eat worms and grubs... by themselves (and nothing else)?