I had a bit of an anger issue when i was younger, I used to get triggered really quickly and so my school gave me an appointment with a behaviour person. She ended up giving me a small deck of cards that had 'tips' written on them for when I felt like I was going to go overboard. The stuff on there was like 'count to ten' 'count backwards' 'recite the alphabet backwards' all stuff to get my mind off the topic. That was over 5 years ago and as such to this day i have had only 3 major tilts.
Try to do things that you know will get your mind of things, make it random, and do it quick, because if you are anything like me, then you need to calm down quick. I hope this helps a bit, goodluck