One very useful method is to be aware of the impermanent and conditioned nature of every experience, knowing that the difficult situation will change, and our anger will pass. Another beneficial approach is to remember cause and effect. If an enemy provokes us, we should know that they are creating bad Karma for themselves, which will surely return to them. Instead of getting involved and creating even more negativity, we can feel empathy towards them. One may also use mantras, which allow unwanted emotions to pass without letting them reinforce any bad habits. By simply being aware of the feeling without acting upon it, the unwanted emotion is not given any energy. It will come less frequently and eventually stay away.
A good antidote to anger is patience, a quality one definitely requires to effectively work with the mind. Without enemies or difficult situations, there would be no chance to develop patience, and without patience, there would be no enlightenment. Therefore, we should try to be thankful for these opportunities. Reacting without anger to whatever appears will set free the timeless wisdom of body, speech, and mind. [Diamond Way Buddhist Network]