There is not one answer to this question, but I just recently heard a inspiring speaker say that the day that your life begins is the day that you figure out what you were put on this planet to do, He said that knowledge without action means nothing. If you know what you supposed to do and don't do it then you are doing the wrong thing because you are putting no action behind your knowledge. I thought about this for awhile after hearing it and I think that the person who said this has a good way of thinking about life. You might not agree, but I found this pretty inspiring.
