Accept the anger, understand the anger, and don't suppress it. That's what I try to do (I often fail miserably). But don't try blowing off some steam by getting physical or verbal on people OR things. I think the science is pretty unanimous and that catharsis approach just doesn't seem to be healthy in the long run, instead it increases anger. But can you use your anger in healthy ways? Running, lifting weights (won't necessarily make you look like a freak), bungee jumping (I did this one once, it made me feel MUCH calmer )? If you're scared of loud noises and heights I can recommend trying to find one of those metal bridges that go over highways and looking down through the bars. Anything frightening, really. That mellows me out a little. Other than that, walking in the forest or going up a mountain can be very soothing.

Good luck with it!