6. Make it very clear you're not up for conversation...with masks
Talkative seatmates and overeager flight attendants are the worst on a red-eye. Throw on your noise-canceling headphones and a sleeping mask, to establish you're not looking for chats or extra chips. That mask may make you look like an idiot, but an idiot no one will bother! And, as it forces you to keep your eyes closed during the countless mid-flight wake-ups you'll no doubt suffer, you're more likely to drift back off quickly.