Snack, don't chow.
"When we fly to Nepal, we're 12 hours off. That's major jet lag. The key is getting proper rest on the plane. I don't eat big meals – I simply can't sit for hours with a full belly. I snack on crackers, cheese, and fruit. Then I usually take a half-dose of a sleeping pill and put on headphones with mellow music from my iPod." - Ed Viesturs, mountaineer, has summited Mount Everest seven times