for me, frustration is the pre-curser to anger. I used to be a very "it is what it is" person and at the current life I seem to have been thrown into I find myself angry a LOT. I have also finally realized that I was a lot more angry than I realized over my lifetime.
I wasn't supposed to be angry though, "women aren't supposed to be like that" and I always deflected with humor too - most of it pretty self depreciating and dark, but humor none the less - if you can't laugh at yourself?
surprisingly therapy has helped a lot, I allow myself to feel angry and admit it, own it, throw it out there to help let it go.
My journaling has helped me with this too.