First you remember that people who get angry quickly Are not liked by Allah & they will lose their friends easily , because of this habit .
Then how to control it ??
When you feel before specking take a glass of water.
If you are standing sit down.
If you are sitting lay down. read drarood sharif .
Make a rule think before you speck. Once you do it.
Believe me when you control your rage you will be filled with internal peace & happiness.