Keep yourself hydrated (With water, soda might make you gassy), bring a sweater, wear comfortable clothes, don't order the pasta, stand up and walk around every 3-4 hours and get an emergency exit or front row seat to get more room for your legs.
Most long flights have snacks and drinks in the back of the cabin (I'm assuming you're flying coach), eat something from time to time and socialize with the other passengers doing the same to keep you sane.
Edit: Oh yeah, also if possible fly with a middle eastern or asian company. Far better than any american or european company I've ever used (My favorites are Qatar and Emirates). Read some reviews here to help you choose. And if you can afford it go for the economic premium seats, yes they're more expensive but they're so worth it on long flights.
Just came back from the game. Shame it was a boring one and being surrounded by Argentinians when you're rooting for the Netherlands isn't ideal (Not to mention seeing our biggest rival win the day after our team suffered the worst humiliation in its 100 year history is just rubbing salt in the wound), but at least I got to see Messi live.
It's a time for change, so I believe this is a good opportunity to kill the Bombcast. Kill it and replace with The Bombcast Tapes: Side A (West coast team, releases on Tuesday) and Side B (East coast team, releases on Friday).
Getting a new Jeff hosted podcast and a new Vinny hosted podcast every week would be pretty sweet.