Etiquette is tricky business since it varies so widely around the world. To get a quick overview of what to do in various countries, hotel chain Swissôtel has put together an etiquette map to help you avoid doing something terribly wrong when travelling.
The map provides basic etiquette rules for 29 different countries. It covers an overview of the basic customs on tipping, gestures, dining, and common do's and don'ts. It doesn't go deep into the customs, but it does provide a quick guide to make sure you don't embarrass yourself by accidentally giving an OK sign in Brazil (where it's an insult) or show the bottom of your feet in Russia (where it's considered rude).
The Ultimate Guide to Worldwide Etiquette [Swissôtel]