my problem is a little different from yours - but still related. i get set off by anger-provoking situations - like you - and i think most of us tend to over-react in one way or another.
but my way is to refuse to let it out - try to control it - stuff it or deny it - and i end up depressed, high BP, feeling like i'm about to blow and not able to - and frustrated.
i know there must be an appropriate way for all of us to express anger safely and in a healthy way. most of the suggestions i've heard - like beating a pillow with fists, hitting a rock with a stick, chopping wood, lifting weights, screaming in an isolated place, etc. - just hasn't worked for me. maybe people who are more able to get it out there will find these helpful - but they just make me self-conscious.
We are often troubled, but not crushed;
sometimes in doubt, but never in despair;
there are many enemies, but we are never without a friend;
and though badly hurt at times, we are not destroyed.
- Paul, II Cor 4:8-9