Craig Newmark, who started Craigslist, uses a travel agent to book his trips. But he still relies heavily on the internet when he travels, especially these sites:

Flightstats.com "Has better status on flights than the airlines themselves."

Seatguru.comDetailed seat maps showing amenities such as extra legroom, power outlets for notebook computers, etc.

Weather.com Sure, it's an old standby, but their weather forecasts are pretty spot-on.

Flyclear.com Pre-screens members so they can use designated airport security fast lanes nationwide. "It gets me through security in minutes," Newmark says. "Makes life a little easier."

Read more about Craig Newmark's life on the road.