Do Something Grand
Take your anger and turn it into activism. How can you use this to change the world? Sign (or start!) a petition. Volunteer. Get involved in the community and make the world a better place.

Write About It
Journaling can help you to work through your emotions in a way that might even help prevent you from getting mad the next time around. Understanding what it was about the event which triggered you will help reshape the trigger entirely.
Switch Perspective
It can be hard to use empathy when you’re upset. But if you can see things from their perspective, it might help you to calm your response. Many times, anger comes from misunderstanding the situation.

Forgive
This technique falls under expert level of anger management. By being the bigger person and forgiving the other, you’ll find you no longer have reason to be mad at all.
The key to all of these is simple: don’t let anger take control. The last thing you need is for you to fall under the power of negative emotion. Use the anger to make a better place or let it go entirely. In the end, you’ll be happier you did.