A company should limit its growth based on its ability to attract enough of the right people.

The best CEOs in our research display tremendous ambition for their company combined with the stoic will to do whatever it takes, no matter how brutal (within the bounds of the company's core values), to make the company great. Yet at the same time they display a remarkable humility about themselves, ascribing much of their own success to luck, discipline and preparation rather than personal genius.

The signature of mediocrity is not an unwillingness to change. The signature of mediocrity is inconsistency.

If we allow the celebrity rock-star model of leadership to triumph, we will see the decline of corporations and institutions of all types. The twentieth century was a century of greatness, but we face the very real prospect that the next century will see very few enduring great institutions.

No matter what. Wherever your mind wanders, it seems to turn up at the same Field of Dreams. It's the vision you wake up with in the morning, and it's the last thing you picture before you fall asleep. Everytime you think of it, the idea in your head seems to get more vivid, filled in with more detail: You not only want to win a gold medal at the Olympics, you not only can see yourself standing there on the podium, but you can also feel the goose bumps as your national anthem is played; the tears are in your eyes. (That's how real a dream can be and should be)

Be rigorous about your HR decisions. There is a difference between rigorous and ruthless.

Building a visionary company requires one percent vision and 99 percent alignment.