Anger is a powerful emotion and one I am deeply familiar with from my own life experience, my own and other people's.
Anger can be a great motivator for change. It gives some people the energy to leave terrible relationships, or succeed in their schooling or career in order to transcend their past.
Anger usually drives activism. Activism is an intellectual way to channel anger into change.
The problem with American culture is that we "other" emotions like anger and lust and even grief. So what do we have? An violent, pornographic culture that denies or fears death.
Seeing anger as a valid emotion that has a right to exist is a powerful experience. So what can you do with anger that isn't destructive? Grow, change, motivate, help others.
The problem with anger is when we get stuck in the blame game and just feed into a circle of petty squabbles or seething resentment (trust me, I'm very familiar, I didn't get here by whistling Dixie, and anger is a frequent emotion that has driven my own excuses to drink too much).
So as someone still working with my own powerful anger myself, and still recovering from the consequences of other people's mishandled anger, the best thing I can tell you is to OWN that anger, accept it, make friends with it...but also find something positive or useful to do with it if you can't release it all. Of course release some of it through exercise, screaming into a pillow, whatever works for you...but whatever you have left over, try to find an outlet that anger would energize into love.
That's all I got.