When I'm upset with someone I have a tendency to cry, which in most case used to make me angry because I couldn't control it when I wanted to so I'd cry more. Now, I just let them go. People that know me, knows that's me. I don't apologize any more for something that I can't control, its just me. But just like laughter is good for you, sometimes a good cry is as well. I get it out of my system and then move on. I also rely on some songs to help me. Like Carrie Underwoods, Jesus take the wheel. Sometimes you just got to do what you have to do to get it out of your system.
There was a study done that people who have a pencil in their mouth long ways, will start to feel good. Because as you grip that pencil, its causes your smile muscles to work and sends a message to your brain that you feel good. I don't know if that's true but some days, I'll try anything.