When you fear a confrontation in which you might become angry, mentally picture yourself handling it calmly and self-confidently. Keep repeating this picture in your mind until you feel fairly certain that you will be able to remain calm in the actual situation.

When you are walking or waiting in a line, utilize the opportunity to think of difficult situations, and find various options you have to deal wisely in those situations. If you live those situations in your mind, they can serve as positive resources from which to gain confidence in your abilities.