"In your anger do not sin": Do not let the sun go down while you are still angry, and do not give the devil a foothold.
This is a useful perspective on anger. The anger in and of itself is not the issue here, but letting the anger lead us to sin is a big issue. We have probably all heard the marital advice: "don't fall asleep while you are still angry." Maybe Satan has some influence on us when we are sleeping and feeling uncharitable. It is a simple instruction, and one I will try harder to internalize.
Holy One, help me to recognize my anger before I allow it to grow. Thank you for all of the beautiful friends and family in my life. I have so very much to be thankful for. Amen