Certain methods can do the job, in case you can’t afford to upgrade, and you can trick your body into sleeping — and people into not disturbing you. Some of the hacks may be obvious — no coffee, alcohol, or junk food. Others, such as grapping a sleep-inducing snack or not picking a seat in the front of the plane, are often overlooked. Don’t be shy, and recline your seat as much as possible; cover your face to block all kinds of light affecting the body’s ability to produce melatonin; make sure you’re hydrated enough; and forget about entertaining yourself with the small screens in front of you.