Bring a Portable DVD Player
Savvy parents know that kids get bored in the air, even if the flight isn't a terribly long one. Portable DVD players can be found online and at big-box electronics stores for as little as $100, and they're definitely worth the price. You know that SpongeBob SquarePants DVD your kid wants to watch over and over -- and over? Well, an airplane is the perfect place to let him or her indulge. Just remember to bring headphones for your little travel companion to keep fellow passengers (and you, too) from having to hear that theme song for the 15th time.
Keeping kids entertained and happy makes the flight better for everyone. The last tip has the same effect, no matter what your age.