Study Portuguese

Some people take their language study seriously whilst others merely want to be able to make basic conversation with locals during their travels. Portuguese is a little harder to get your head around at the beginning but rewards come from persistence. I absolutely guarantee that the better your Portuguese (even if you are only 5 words beyond an absolute beginner) the better your travel experience. Actually this holds true for any language in any country. Speak what the locals speak and the reception is all the warmer.

Study Portuguese in Brazil
Brazilian Portguguese on the web
Brazilian Portuguese language books
Dictionaries
Language translators

For lists of actual Portuguese vocabularly that you can use on the road try the Vocabulary section.