I practice focusing my Chi Kung and centering myself, I very rarely get angry due to my practicing of Martial Arts. Either that or I bottle it up inside until I practice my Tai Chi Chuan again and use my Chi to push the anger around my body until it dissipates. I find long walks help also.
I'd just think of the consequence when I act out my anger like prison time or worse, that will keep me in line.
I'm doing nothing, trying not to think anything for a while. When this first period is gone, it's much easier.
read the Bible, and try to refocus through classical or jazz music. Sometimes, I go ahead and vent- which only makes me more upset Let go of things you can't control.