You behave yourself when dealing with local hotel clerks/train operators/tour guides etc. Whether it’s for selfish gain, helping the reputation of Americans traveling abroad, or simply the spreading of good vibes, you will make nice even when faced with cultural frustrations and repeated smug “not possible”s. This was an especially important trait for an American traveling during the George W. years, when the world collectively thought we were all either mentally disabled or bent on world destruction.