Games: Maynard prints out Sudoku puzzles. A deck of cards or your favorite travel version game is a great way to kill some time. For the 2 of us, we like Phase 10, Uno and Card Monopoly. If you are able to recruit some players, try Duple, Anomia or Quao. Warning these games can get loud be conscious of your surroundings.
People Watch: The airport is one of the most entertaining places to watch people interact and avoid interacting.
Talk to a neighbor: Chat with some of your neighbors. You could learn some new information about your destination or it could be time to give your karma a boost and pass on a hidden gem to another traveler. We’ve met some fantastic people while waiting at the airport.
Treat yourself: Grab a massage, haircut or get a manicure. A lot of major hubs have kiosks or stores available for pampering and lowering stress.
Practice: Experiment with your camera. Practice using the different settings. Get to know your camera before you arrive on your holiday.
Charge Up: Use this time to charge all your devices, so when you land you are ready to go.
Explore: Most airports have exhibits and different shops designed to entertain and occupy your time. If you have a long enough layover or find yourself at a train station, consider going outside and exploring.
Stretch: Move around, stretch those legs, chances are you are about to be sitting for quite awhile.
Have a good meal: I know airport food can be a bit pricey, but the prospects of a nice solid meal of your choosing can help cut down on the stress and anxiousness of a long flight.
Catch up: Get online, empty your email box and reply to all your last minute messages, tweets and texts.
Read: Books and magazines always seem better when traveling.
Sleep: this one is pretty self-explanatory. Set an alarm just in case.