10 Tips for Air Travel 

1) Plan ahead. Start looking at the Internet sites early for the best fares.
2) Delay your trip if you are not feeling well.
3) Reserve a seat near the wing if you are prone to air sickness.
4) Carry any medications with you.
5) Allow ample time to check in and reach your departure gate.
6) Double check your departure gate periodically even after you've arrived at airport.
7) Wear loose comfortable clothing
8) Wear comfortable shoes that you have worn previously.
9) Carry food that's easy to eat, like granola bars.
10) Stand and walk around the cabin periodically.

Source: http://www.asma.org