Being prepared helps. Knowing you can get angry quickly is half the battle. Now you can make a plan for the next time it happened and follow your plan instead of letting the anger get out of control. I found creating affirmations helped. Create them when you feel fine, make a list of a few and when you feel the anger rising choose an affirmation and repeat it over and over in your head. It has something to do with changing your internal dialogue from “I’m angry and I can’t control it” to “I’m angry but I can control it.” Don’t assume it’s not working. It’ll take a little time for your brain to get the message.