If you want to be happy, then don’t harbor a grudge. Holding on to anger, resentment, and hostility hurts you, psychologically, emotionally, and physically. Even if the incident happened only yesterday, the person you are mad at may not even remember the incident, so what’s the point in continuing to be angry? Don’t give up your power to have positivity in your life just to harbor a grudge. Find a way to move past it. Take an anger management class or read books offering specific strategies for dealing with anger issues. Take good care of yourself—love and respect yourself enough to let go of a grudge.