If I were traveling to another country, for example Mexico, and I could bring only 3 things, I would bring:
1:) A Spanish - English Dictionary
2:) Unique gifts from my country to give to natives, things they could not possibly have
3:) Pre-researched maps and notes of the areas I am going to with contact info, transportation info and safety issues. Basically a journal of pre-researched information that I have collected.
Buendia