How can I discover my best use or where I have an “edge”?

Check out the work of Marcus Buckingham. http://standout.tmbc.com He writes fantastic books and they have tests that help you learn a lot about yourself. His mission is to help you reach your potential. Strengthsfinder helps you know your strengths so you can capitalize on them. StandOut takes what you would do in situations and uses that information to help you know how to apply your strengths to best advantage. They are both fabulous if you are seeking either self-knowledge or keys to best directing yourself. I highly recommend this author. Also, not a bad idea for people trying to decide what to major in or what career to pursue.