Pack for a good night's sleep.

Not all sleep environments are created equal. So bring a few simple things to help create better conditions for sleep, like earplugs, an eye mask, and a good book to help you wind down. And easy-to-pack snacks like peanuts and sunflower seeds contain sleep-inducing tryptophan.

Anticipate the new time zone.

A few days before your trip, adjust the times you get up, have meals, and go to bed to be more in synch with the time zone you're traveling to. You'll have an easier time adjusting when you get there.