From the Sydney Morning Herald, via Reddit: a group of US businesses are preparing a guide for Americans travelling overseas to combat the image of the "Ugly American". The sample tips provided in the story are worth a look, as most of them are actually pretty OK - not the kind of insensitive tripe I was expecting. Of course, it's sad to have to say most of them at all. My personal favourite is:
"Save the lectures for your kids. Whatever your subject of discussion, let it be a discussion not a lecture. Justified or not, the US is seen as imposing its will on the world."
While I'm sure the last sentence is supposed to mean "whether that viewpoint is justified or not", the first time I read it it ended up as "whether the US is justified or not". But in any case, it's damn good advice.