Teamwork remains a sustainable competitive advantage that has been largely untapped because it is hard to measure (teamwork impacts the outcome of an organization in such comprehensive and invasive ways that it's virtually impossible to isolate it as a single variable) and because it is extremely hard to achieve (it requires levels of courage and discipline that few executives possess) - ironically, building a strong team is very simple (it doesn't require masterful insights or tactics).

I have yet to find the man, however exalted his station, who did not do better work and put forth greater effort under a spirit of approval than under a spirit of criticism.

I can't tell you how many resumes we get from business schools across the country from black women and black men and Hispanic women, men, etcetera, who say I'm interested in working for your company because they can see someone at the top who looks like them.

I worked with Congress on legislation, gave speeches to CEOs, military generals and Hollywood executives. But I also worked to ensure that my efforts would resonate with kids and families - and that meant doing things in a creative and unconventional way. So, yeah, I planted a garden and hula-hooped on the White House lawn with kids.

To grasp and hold a vision, that is the very essence of successful leadership-not only on the movie set where I learned it, but everywhere.

He who finds a new path is a pathfinder, even if the trail has to be found again by others; and he who walks far ahead of his contemporaries is a leader, even though centuries pass before he is recognized as such.