1/Bring along plenty of books and pastimes for the trip.
2/Allow plenty of time to get to the airport and check in.
3/Just remember that commercial airline pilots would not be doing this if it was not safe, flying is safer than driving a car.
4/Make sure you pack everything you need; passport, currency, insect repellent well before your flight, you don't want to stress of leaving it till the last minute then finding you have left your passport at home.
5/Avoid Coffee as it acts as a stimulant and can increase anxiety.
6/Avoid alcohol.
7/Aircraft are subject to stringent safety tests and pass thousands of flight inspections before flights.

via ecademy