How to sleep better on a plane?

SLEEPING on a plane often requires more effort than it does relaxation, but its absolutely worth it.
Late night flights are called “red eyes” for a reason, and no matter how energetic or fit you may be, muscling through your day on minimal sleep is never a good idea.
That said, late-night flights are also an extremely practical way to get more bang for your holiday buck. The key is to have a system for getting some shut-eye between runways.
Here are a few tips that can make nodding off considerably easier.
Choose your itinerary wisely
When overnight travel is inevitable, nothing is more important than choosing the right itinerary. Pick the non-stop every time and, if one isn’t available, choose the itinerary with the longest single leg. You’ll have more uninterrupted time to nap, wake up and try to doze off again. Late departures are especially helpful unless you plan to work during the trip.
Next, consider the seat type and location. Use the rest room before you board and pick a window seat. It provides more space to lean against the window and no one will climb over you. Seats near the front of the cabin tend to be quieter, but avoid anything near a lavatory or galley.
Save frequent flyer miles for long-haul international flights that have lie-flat seats in first or business class.