São Paulo, the largest city in the Southern Hemisphere, can be very overwhelming especially when one has to figure out how to get from one region to another. Luckily, the city has a pretty good public transportation system that is usually reliable and efficient. However, if you don't have a basic understanding of how it works or what the unspoken rules/tips are for taking public transportation, the task can seem daunting. Being seasoned public transportation users, we have decided to let you in on the secrets and tricks that make using this megalopolis' public transit a breeze.