In Part I of this series we introduced the Excellence Trap, and diagnosed its drivers and shortcomings. Here in Part II, we’ll take a close look at the costs we incur when we’re in the Excellence Trap, in order to see clearly what unsustainable people and organizations suffer. Then we’ll turn to the solution, introduce mastery and five shifts we must make to become sustainable. And in Part III we’ll discuss the way to get there, as well as the way not to.