Working out is a great way, especially either lifting weights or beating the crap out of a punching bag.... If you don't have access to either of those, wearing yourself out with pushups or sprints could work as well... Not only is it an aggression release, but it triggers endorphin (natural "happy" chemicals) release in your body as well
Note from personal experience, don't try wall-punching when angry. The wall will win, and your hand will hate you.