I recently finished Linchpin by Seth Godin. Seth does a superb job of describing the characteristics of being a linchpin. He leads your thought process, describing the characteristics that one needs to acquire to become a linchpin in the world.
This was an exceptional book. I feel like I learned a lot and that I missed a lot. I definitely plan on going back and reading it a second time.
Read it. Then go and do something with it.