Remember to look up at the stars and not down at your feet. Try to make sense of what you see and wonder about what makes the Universe exist. Be curious. And however difficult life may seem, there is always something you can do and succeed at.
One of the most basic factors in sports is that winning becomes a habit, and loosing is the same way. When failure starts to feel normal in your life or your work or even your darkest vices, you won't have to go looking for trouble, because trouble will find you.