Learn (at least a little of) Portuguese

Brazilians are generally kind to foreigners. Knowing a few phrases can be cool if you want to blend in with the locals, or even get some information.
Learn simple phrases like: Hi! How are you? (Oi! Como vai?) 
Thank you! (Obrigado! if you're a man) e  (Obrigada!  if you're a woman)
Please!  (Por favor!)
Where is the restaurant? (Onde é o restaurante?)

Learn numbers too, but the most used. You can count on Youtube to learn some basic phrases. Another site that is great for pronunciation is www.forvo.com .There are millions of pronunciations words and phrases spoken by native speakers in more than 300 languages​​.
Finally, speak  Portuguese with foreign accent is very charming, and can help you if you want dating or making friends.