The No-Crash Landing

1,227 The number of CEOs who left their posts in 2009, the lowest turnover in five years.

We all know one: The business traveler who manages to rack up tens of thousands of miles with no apparent wear and tear on the psyche. That enviable colleague who "doesn't do" jet lag, who bounds off a cross-country flight with so much pep you want to smack him, if only you had the energy. What's the secret? Five intrepid travelers, including one with actual sleep science credentials, spill.