1. What you can be the best in the world at (and, equally important, what you cannot be the best in the world at).
2. What drives your economic engine.
3. What you are deeply passionate about
These three things help make the Hedge Hog who he is. Take some time to think about what you do good and write them in three circles. in the area where the there circles overlap is your area of greatness. Find this area and work on these skills.