The reshaping of organizations that began at the turn of the century continued this year at an accelerated pace. Digital technologies, the emergence of new global competition, and the expectations of the next generation of workers are but a few of the driving forces. How organizations respond and reshape themselves will determine whether they are on a trajectory to achieve greatness, or are relegated to mediocrity. For many companies, it is their teams and team leaders that sit at the epicenter of this dynamic landscape. They will, to a large extent, determine where their organizations land in the distribution from mediocre to great. A key challenge leaders face is understanding where to focus their change efforts.