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.  There is no other force but G-d.  And although this person who insulted you, or hurt you, or damaged your  property — he 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 your problem.  ~Bringing Heaven Down to Earth by Tzvi Freeman