By staying busy, doing lot of exercises, listening to soft music, regular practice of asanas and deep breathing exercises.
Of course calling peace and doing meditation daily as well as looking for the real cause of anger such as frustration of desires should be addressed.
Most importantly we should never justify anger. Instead becoming vigilant and stepping back before speaking and action will go a long way in diminishing outbursts of anger.
Affectionately,
Alok da.