Have you experienced a different set of norms from another culture either by traveling somewhere or by meeting a foreigner here in America? What was it like? Were there misunderstandings?
Something else that you might want to blog about is google another culture where you would like to travel. Find out what unique norms exist in their culture. Here is a link to cultural etiquette around the world.
Moral holiday places
For more info see Ferris and Stein 79-80