Best ways to cope with anger?

No idea if this will help you. Used to be an angry teenager. Suppressed anger and then had outbursts. Regular exercise certainly helped, but most of all analyzing the feeling. I felt it's like a tight knot and letting it out by violent behavior actually pulled it together harder. So instead I started to calmly untie it. Analyzed what caused anger and if there was any real reason for it. Like some guy calling me out for a girl I used to date might seem like stressful event, but if anything, it's rather humorous how some of these human monkeys behave. In general pulling myself out of the reacting pool and sitting on a strategists bench has done wonders.

//edit Also, wanted to add. A simple "knocking-out" can have far worse consequences. From having to pay someones medical bills for brain damage to doing time. Think if it's worth the risk to get angry. Either way, when you engage in a fight, never do so hotheaded. Fight when you have control of yourself and know what to do.

You don't wanna knock him out huh...?
Kick him in the nuts.
Oh, or you could punch a wall, or a punching bag, or just punch SOMETHING, maybe a wall right next to his face?