Very nice tips DirtyWhiteBoy.
People in general are very friendly with "gringos" they just want to make you happy, enjoy the country and get as many dollars from you as they can.
My biggest advice is to enjoy your vacation with a local friend, don't go thinking John Stagliano walks by himself into shaddy nightclubs in Rio looking for exotic big butted Brazilian girls ;]
Avoid the "innocent tourist full of greens" look, walk with confidence, act like you own know exactly where you're going, even if you're lost hehe.
Definitely don't trust anyone, even a police officer! Yes, they can rob you too.
Always remember, you're never completely safe in Brazil... But if you follow the basic rules I'm sure you will have a safe and pleasent vacation.
Exchange a reasonable amount of money, only what you'll need. Dollar is instable in Brazil, so it might be worth more tomorrow.
As a woman, if you come alone during Carnaval time, keep in mind guys you try to eat you alive in a street parade. :-p
