If you are in a lie-flat business class seat you won’t have anything to worry about.  But with J seats becoming harder to redeem, sooner or later you will find yourself in the economy section of a long haul flight.

Conde Nast has some ideas to help you out.

What worked best for me was getting a little help from my Dr in the form of sleeping pills and putting a boring movie or tv show on.  Failing that, download a podcast on quantum physics or similar!  It also helps if you are physically tired.  We always go into town and look around on long layovers.