Ehh.

Maybe like you said, you could walk it off before you take action. You can try doing something that's calm, like reading a book or listening to the rain! You can exercise to help get rid of all the negative energy. That's what I usually do and it works for me, as long as I exercise hard to enough to actually get rid of the anger. Even crying about it does help. You're still releasing the emotions that are being bottled up inside. I've heard before that anger is a secondary emotion. That means that anger is what we feel when we're really covering up another, more "vulnerable" emotion. Maybe you could try journaling or drawing a picture to help bring out those deeper emotions and deal with them in a healthier way than getting mad and shoving them away. I don't know if any of these will work for you, but these are all my ideas. I hope you find something that works for you!