Hope you South America fans can help me out. I'll be traveling soon to Sao Paulo from the US (US citizen, female), and well, have never been outside the US/Mexico before and never by myself. I have a passport and understand the rules for obtaining a business visa. Any tips or advice for me? Simple things such as exchanging currency if US $ can not be used, taxi's, tips, customs, airport info, carry-on luggage issues, converter/adapter needed? (recommendations if it is needed?), and anything else would be appreciated as this will all be new to me. Flights will most likely be on AA and I'll be Plat at that time. Thanks in advance.