It is the bane of travelers getting on a plane for both business and pleasure—difficulty falling asleep in a seat, especially in coach, and the attendant horrors of jet lag after landing. Studies have shown that lack of sleep can decrease brain performance by 20 percent, so it's crucial to anyone crossing time zones to rest as much as possible during the flight. 

Washington, D.C.–based clinical sleep educator and RN Terry Cralle shared her tips for powering down (and getting at least a power nap) on a flight.