Prepare yourself with this meditation, and when you feel anger overcoming you, run through it in your mind:

Know that all that befalls you comes from a single Source, that there is nothing outside of that Oneness to be blamed for any event in the universe.

And although this person who insulted you, or hurt you, or damaged your property is granted free choice and is held culpable for his decision to do wrong—that is his problem. That it had to happen to you—that is between you and the One Above.