Write an article based on this "Pack a water bottle. Have a neck pillow and sleep mask at hand. Wear comfy socks. Wear something warm. Consider using noise-canceling headphones. Snack!"
While you don't need to drink more than normal on a long-haul flight, you will need to keep hydrated. Having your own water bottle at hand will prevent you from having to make many trips to the water facility on the plane. You can't bring water through the security checkpoint, so make sure you empty your water bottle before going through - you can fill it up again on the other end. You'll definitely want to sleep (or at least try to) on your flight. You'll be much more comfortable doing so with your own neck pillow and sleep mask. Many airlines will provide you with a small pillow and sleep mask, but these tend to be quite uncomfortable and the pillow often slips from under your head. A memory-foam neck pillow is a great travel companion, offering lots of comfort and sturdy support for your head. Your feet might swell if you sit for too long, so taking off your shoes can help you feel more comfortable. You won't want to walk around the plane barefoot, so wear some soft socks. Avoid wearing socks that are too scratchy, as they can hamper your ability to get comfortable. The temperature in airplanes tends to vary between extremes of hot and cold. Wearing a scarf or jersey can help you cope with a cold environment and they can be easily removed if you feel too hot. A compact travel blanket is a useful travel companion, but may not be necessary as many airlines offer a blanket on overnight flights. Planes are noisy places. If you're a light sleeper, wearing noise-canceling headphones while you sleep can help you have a more restful journey. Airplane food is notoriously bad. Bring some snacks that you like along with you and eat them when you feel hungry. Having small snacks between meals will keep your energy levels up. Granola bars and small chocolate bars make great airplane snacks. Individually wrapped morsels are particularly good for long flights because they help to keep the area around your seat clean. For a savory snack, consider bringing little cheese rounds or jerky.