Athletes often beat themselves up after making mistakes, which doesn't help their confidence. In fact, it's the wrong way to handle mistakes. It hurts their confidence and enjoyment of sports.
In life, we are all given certain opportunities and what we do with those opportunities determines where we end up. Some of these opportunities lead to our goals and others lead us away from them. Do you choose to spend time studying and gaining knowledge or do you choose to party and always do what is “cool”?