Begin by checking you local yellow pages under foreign chambers of commerce, consulates, and social organizations. Ask if they offer any language lessons, cross-cultural training or written material. In these departments you can usually find teachers and students from the country where you are relocating. These people are valuable resources as they can tell you first-hand about the behaviors of a culture. Unlike a grammar book, they know which expressions and words to use.
Most people are more than happy to talk about their native country.
It's a good idea to talk with as many people as you can to get different perspectives. Another excellent option is the Internet. Many foreign language teachers communicate through email. Students look for people to chat with in various languages. Search the Internet under international newsletters and cross-cultural training associations.