40 under 40 rank: 15
I've had the good fortune of having many mentors throughout my career -- men and women. And I've tried to seek and heed their advice. I was fortunate to get the most important advice when I was young and early in my career. One of my mentors said "you're going to have success in your career, just make sure you never believe your own press, because you'll stop trying as hard." I've lived by that advice pretty rigidly ever since.
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Last updated October 22 2010: 8:09 AM ET