Eating right while traveling is as much of a struggle as going through security checkpoints. As much as we want to believe that salad or sandwich we hastily grabbed near our gate is sodium-free and fat-free, that's not often the case. No one knows this better than flight attendants, who basically live at the airport. So we thought, why not ask how they stay healthy on the job? We picked the brains of three frequent fliers and compiled a list of tried-and-true healthy hacks they swear by. Read on for some life-changing tips.