Some people say they are always behind everyone else, but that is not the case. Everyone is always a step behind someone, including the best out there. It takes a special skill to be able to discover things and learn whenever you wish. Self discovery is important because it's what allows us to take control of ourselves and our future.
Knowing what you want is one of the greatest challenges in life, even though the list always changes. We may not always have the answers in front of us, but if we learn to look for answers in the right places, many problems can be eliminated. We all have the ability to research, try and experiment with anything that interests us, whether it's music, the arts, programming, sports, and so forth.
Self discovery is a life-long process. Even when we reach the point in life where everything is going our way, it's no reason to stop growing as a person. There is too much to see and learn about in this world to be fooled by some success. Success, after all, is a state of mind, and must be actively sought after.
Remember: Not knowing isn't the problem. Not knowing how to get what you want is the problem.