Conscious control helps overcome unconscious defense mechanisms. Forgive others that have wronged you. Forgive your self when a wrong is done. Forgiveness is the best defense against unhappiness and depression. Forgetting those things in the past and press on toward the future.
Patience is a virtue.
The immature want it their way now, and become easily frustrated and unhappy. Accepting and giving love is a great defense against loneliness and inferiority feelings. Have the ability to laugh at yourself and your mistakes. Redirect your energy in positive ways. Hostile energy can be channeled into sports and exercise.