Patience is a strong antidote to anger.
Practice patience. In times of anger or frustration, pause before reacting. You will find a calming effect and discover that you need not react in anger, but instead react with the peace that thoughts of Jesus bring to mind.
Peace I leave with you; my peace I give to you. Not as the world gives do I give it to you. Do not let your hearts be troubled or afraid.
John 14:27 (NABRE)