" There is a theory about human behavior called the 10-80-10 principle. I speak of it often when I talk to corporate groups or business leaders. It is the best strategy I know for getting the most out of your team. Think of your team or your organization as a big circle. At the very center of it, the nucleus, are the top 10 percenters, people who give all they've got all the time, who are the essence of self-discipline, self-respect, and the relentless persuit of improvement.
They are the elite- the most powerful component of any organization.
They are the people I love to coach.
Outside the nucleus are the 80 percenters. They are the majority- people who go to work, do a good job, and are relatively reliable. The 80 percenters are for the most part trustworthy and dutiful, but they simply don't have the drive and the unbending will that the nucleus guys do. They just don't burn as hot.
The final 10 percenters are uninterested or defiant. They are on the periphery, mostly just coasting through life, not caring about reaching their potential or honoring the gifts they've been given. They are coach killers.
The leadership challenge is to move as many of the 80 percenters into the nucleus as you can. "

― , Above the Line: Lessons in Leadership and Life from a Championship Season