I've really learnt to supress my rage also. I've found that not talking to everyone at work really helps. remember grant me the courage to change the things I can, the serenity to accept the things I cannot and the wisdom to know the difference.
I personally struggle with the second one, as I found myself screaming out my car window today at some F*ck1ng stupid tart who had an "I love animals" sticker on the back of the car but she was smoking with her infant child in the back.
Sweetart, hows about hou stop giving a shit about the animals and start caring for you daugther eh? Man that cuts me up. /end rant