This is the 3rd installment in our series on the best advice received (and applied) by top entrepreneurs, from Fortune's May 21st issue.

Today we start with Rick Warren, who shares some rather shockingly honest perceptions, to Peter Drucker with life changing insights, and the CEO of Jet Blue on the importance - no, the mandaratory necessity - of balancing your family with your work.

I found Rick Warren's advice very interesting and very startling, although I think very accurate. He says that you definitely need mentors and models. Models are "the people you want to emulate." However, he says that the models need to be dead, because some people can start their lives off well, but end up rather tragically. This is not only a huge disappointment later on, but can be quite devestating.

He has sat at the feet of Peter Drucker for a long time, and one of the things that has been drilled into him is: "There is a difference between effectiveness and efficiency.
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