By Kathryn O'Shea-Evans
October 15, 2013

Empty your mini bar. “Stop by a supermarket on the first day of your trip to pick up pre-cut veggies, nuts, fruit, yogurt, and protein bars.” You can swap them into your mini bar upon arrival and, at check out, return all the soda and candy bars.

Travel can be tough on your immune system, so eat really right. “Vitamin C-rich fruits and vegetables (citrus, bell peppers, strawberries, broccoli, kale) help improve your immune system. High fiber foods (berries, brown rice, oatmeal) keep you feeling full longer. And garlic has antibacterial properties!”

Kathryn O'Shea-Evans is an associate editor at Travel + Leisure. Follow her on Twitter @ThePluckyOne.