Always have your camera in your pocket. My best pictures weren't of museums and landmarks, but of people, things, and happenings that I just happened to catch randomly.
near the Sacre Coure in Paris, when the Nigerians ask for you to give them your hand for a second, don't give them your hand.
When I visit...anywhere, I try to limit my alcohol consumption? It really eats into your budget.
Always do what you want to do and dont let anybody stop you just because they dont want to do it. Biggest mistake i made on my travels.
Make sure to bring your Student ID! I got multiple discounts on major attractions and hostels.
the people make the country. get to know them. the "language barrier" is not an excuse to avoid communicating. communication is more than just words. make the effort. there is so much to learn.
When I visit i always make sure to have cash on hand, layer my clothes, and let go of my "american" standards of life!
When I visit..any third world country I take a shot of Pepto Bismol every morning and evening, and I've never gotten sick. Of course, I drink bottled water.
Take a prescribed sleeping tablet if you arent a fan of long journeys...I cant even remeber coming home from California!