i keep a journal, just a small notepad i carry with me, im always writing things down, i call it "cleaning out the attic", you keep that crap bottled up and soon they spill over into real life in my case
now most of my anger comes from "perceived threats" my own fantasy of someone doing me harm or trying to get me fired ect..
in my journal i write down "you arent being attacked""there is no threat""noone is out to get you" and i make a list of the things that arent really going on around me like that.
and at the end of the week i toss the journals, i have no need for them anymore, i have no desire to re live those dark thoughts, and i go buy another notepad for a buck up the street.
i used to laugh when people said the word "journal", but they too are a tool to use., once they have served their use get rid of it, why keep it? to reminiscence of days gone past to remind yourself how much of a $#%^ mood i was in? no my dude toss it.
Clean the attic and im telling you once you start you are gonna burn some pages up stock up on pens!
anyway this is a tool i use to calm myself down, because i can go real deep in anger real quick., i feel you i hope you find something to clean that attic