anger is a pain. treat it like the injury it is:
you feel angry (you feel pain)
stop, take a moment to gather yourself and breathe deeply (stop, take a moment to apply first aid to your wound)
find the root cause of your anger; what brought your anger about and how come? (find what caused your injury; what hurt you, what type of wound?)
what can you do to regain control? try not to fuel the anger with violence; mitigate by being gentle to yourself and others (what can you do to keep you safe from further and future injury? what further treatment do you need? try not to aggravate your wound; be gentle and cautious)
accept you've done all you can, continue to breathe deeply, and find comfort away from anger and violence (accept you have done all you can and continue to take care of yourself)