^ stick with this guy's advice.
>>1 But y'know, everyone has a different reaction when they're angry.
I use to have anger issues as well. And in those cases thankfully I always use to keep a pen (no I did not stab people). But whether I had a paper or used my hands I drew a certain symbol which I've come to know as my peace symbol. It just acted as a reminder of who I was. It didn't calm me down but rather reminded me to control my anger, up to you what you wanna use!