Having close access to ultra-successful people can yield some pretty incredible information about who they really are, what makes them tick, and, most importantly, what makes them so successful and productive.
Kevin Kruse is one such person. He recently interviewed over 200 ultra-successful people, including 7 billionaires, 13 Olympians, and a host of accomplished entrepreneurs. One of his most revealing sources of information came from their answers to a simple open-ended question: What is your number one secret to productivity?
