If you are really mad at your sister what should you do?

If you are so mad at your sister for doing something wrong that effected you you should just blow it off.To do that is to relax say anything to her you want to then walk away.If you are mad enough to hit a wall simply take a pillow,or something soft and punch the crap out of it.Let your anger out on your cat or something other than her cause she might hit you and make it worse.