Being in an airplane means mixing up with different people, and often, with people from different cultures. It will be good for you to know some basic airplane etiquettes to be able to deal with the general public well.
First, remember not to ever infringe other people's rights. If there is a line, fall in the line and let those who stand before you go first. Do not invade space that that is not rightfully yours, like you seatmate's space. Keep your arms from too much moving and waving around. When you're reading newspapers and magazines, do not extend the papers on the other person.
Second, do not cause any pollution, be it noise, air or pollution. Never spoke in the airplane nor in any other public places. Do not talk with other people if you think they are not interested in listening to you. You will readily feel it if people don't want to talk to you. And also, don't talk to loud once you have somebody to talk to. Don't throw things in the air like pillows and papers.