Safety is an important thing that every passenger has to keep in mind while air traveling. If you're traveling for long distance, then it is good idea to carry sleep travel kit with you. This can contain eye mask, travel pillow & ear-plugs to block sound. The passenger must also listen to the flight attendants while they review safety information's. If you're traveling above water, know where the flotation device is situated. You must always follow the directions given by your flight crew, particularly during the emergency conditions. Keep your alcohol level minimum on flights as alcohol will affect more badly then when you're on ground because of pressure inside the cabin.
Before you start your airline traveling, it is important to research about the rules and regulations of a particular country because rules differ from one country to another country. Make yourself prepared and have a happy and safe journey!