A person once changed my perspective on "being angry".
"Being" angry is identifying your person with the anger.
An alternative perspective is to remove yourself by a degree and think or say the "anger is flowing through me".
In this way I can bear in mind that "this too shall pass" and examine my anger as a third party, which I find more beneficial than directly identifying myself as angry.
I find the technique especially beneficial when expressing anger live, on the set, with the person I am angry with. It works well to say to the other person, "Anger is flowing through me".
It took some time for me to develop this method and I still have to work on it but I have found it very helpful in dealing with my angers.