When the smell of a Cinnabon greets your arrival at the airport terminal, who could resist on an empty stomach? Well, if you follow these tips, you may have a better chance of holding onto your willpower. According to a nutrition expert, the most important rule of thumb for avoiding unhealthy airport food is to eat a healthy meal before you leave home. Always stock up on water once you get through security (dehydration can lead to unwise food choices) and, if you must eat something, look for a smoothie spot that offers Greek yogurt as an ingredient so you’re guaranteed some substantial protein. Last, but not least, since you’ll be sitting on the plane for a while, walk as much as you can (for best results, in a direction far away from those tantalizing Cinnabons).