How often do you feel angry? I hope it's a rare experience. Aristotle taught us that there's nothing intrinsically wrong with this emotion. It can be rational and appropriate, but only with the right reason, toward the right object, in the right measure, and for the right amount of time. Anger toward an injustice can rouse us to work to stop it. It can light our fuse and get us moving. But if it continues to burn, then we're going to be the ones incinerated by it.
Frequent anger is corrosive to the soul. It's a poison. And we need to understand it better in order to avoid it more.
Anger often arises from fear or frustration. When you feel it welling up in you, you should ask, "What am I afraid of here?" Or "What's frustrating me right now, and what can I do about it?"
If something's bothering you that you can change, then action is better than anger. If it's something you truly can't do anything about, then acceptance beats anger any day.
The more often you feel this emotion, the more you should analyze your fears and frustrations. If you can deal with them properly, then this inner disruption will not bother you so much, but rather, literally, leave you in peace.
And, ultimately, it's only from a state of inner peace that we can best face new challenges and situations that would otherwise spark in us fear or frustration.
When we deal properly with the inner causes of anger, the results can be grrrrrrreat!