If the work you'll be doing is outside of the country, you might need to get immunizations, passports and medicines that otherwise might be unavailable during your stay.
If you're going to be working with locals, you'll want to learn as much about their culture and language as possible. Learning even simple phrases like "thank you" and "hello" is a step in the right direction. Become knowledgeable about local customs so you don't inadvertently show disrespect to your hosts [source: Schaler]. If you're uncomfortable with any customs, you might want to consider looking for another location in which to do your work.