Staying hydrated is key to energy and clarity, but travel tends to dry. This is bad news, especially when jet lag is also doing a lot of functions to work, says Jenny Beth Kroplin, RDN, LDN and founder of Jenny Beth RD Nutritious Love. "Drink lots of water before and after traveling, as well as in the air," says Kroplin. "The air inside the plane can become dehydrated for the body, so it is important to keep abreast of hydration to help reduce the symptoms of jet lag." Kroplin recommends carrying a 24 or 32 ounce bottle of water on the plane and refilling it at least twice during your flight.