14. Another good tip is to eat before you head to the airport. We all know how bad that food at the airport can be, and honestly, the food on flight can be even worse. So be sure to eat something healthy that will make you feel full for a few hours. Also, consider packing nuts or some fruit on in your carry in luggage. However, do not forget to eat it before you get off the plane in case you are going to some place where they will take the food from you because of the agricultural restrictions.