You have no control over what angers you, but you do have control over what you do after you become angry. The deadly sin of anger is the sudden outburst of emotion -- namely hostility -- and sustaining thoughts about the desire for revenge...
Patience, the virtue that allows you to adapt and endure evil without harboring any destructive feelings, is the best countermeasure for anger. When you give yourself the time and opportunity to cool off, anger dissipates and more practical concerns come to the front line.
Catholicism For Dummies by John TrigilioRecommended reading: Back to Virtue by Peter Kreeft. He examines the virtues in depth and also looks specific virtues and Beatitudes as antidotes to each of the seven deadly sins. Not a new concept but one that he writes about superbly (as always).
And on we will go next to Gluttony.