ravelling abroad is not so different than travelling anywhere else. Some tips I can give you are:
1) Pack according to destination weather/climate.
2) Read your airline/airport instructions carefully on what can be in your bags and what cannot.
3) If you have large bottles of liquid or perfume pack them in the suitcase not your hand luggage as the airport ppl will confiscate them.
4) NEVER accept any bags or anything to keep in your bag from someone you do not know.
5) Lock your bag carefully
6) Stay aware of your surroundings and your bags if you have a stopover somewhere.
7) Be calm. Air travel is fun. Enjoy it :)