Anger is shaitaan.
Shaitaan is made of fire.
Deminish fire with water.
Conclusion: when angry: Do wudhu.
Still angry? Sit down.
Still angry? Lie down.
Still angry? Go in sujood, remember your Lord. Ask for forgiveness. Remember the rewards of patience.
Do not let shaitaan win this battle.
Do not grow weak before he who shall spend eternity in the depths of hell.