Pick up a package of pre-cut carrot and celery sticks at the local grocery store before your flight. Several companies now sell mini individual-sized tubs—remember, airline restrictions prohibit containers larger than 3 ounces—of peanut butter, hummus or ranch servings. It’s an easy, healthy holdover for a long flight.
Grab a cup of instant-soup, either the cheap stuff like Cup-O-Noodles or a fancier version of Thai just-add-water noodle bowls. Most flight attendants will get you a cup of hot water they’d normally use for tea—just wait until they’ve finished their service rounds before asking for it. (That will reduce the chance they end up dumping it in your lap during the chaotic food service period.)