When you utilize your mistakes as learning experiences to help you improve in the future, you grow from the experience. Therefore, the Talmud (Gittin 43a) says that a person does not have an entire grasp of a Torah concept until he has erred in it. Making a mistake can lead to greater clarity about how to prevent more serious mistakes in the future! The fool is someone who fails to learn from his mistakes and continues repeating them.

Think of a mistake you feel bad about. Now view that mistake as a learning experience. Realize how the lessons would have been missed had you not made that mistake. This will put the "mistake" into a whole new perspective.