11. Dress to impress. While the world is becoming more casual in some respects, each part of the world has its own dressing etiquette. For instance, European men would not have been caught dead in shorts outside a beach resort. Now, shorts are acceptable in some places like Rome where they used to be practically forbidden. Whether you like it or not, you will be judged by the way you dress and treated accordingly. Don't take it personally if you find yourself improperly dressed, chances are you will be treated just like a local in the same situation. While locals may be more lenient because you are a tourist, it is better to blend in with local dress customs.
12. Smile a lot. It will get you further in all situations.