It is the easiest of the humanities AP Exams. Just read
The World Is Flat, study the AP Barron's book, and watch a lot of
FRONTLINE videos. Apart from the memorization of vocabulary words in the Barron's book, you need to learn a few concepts like the Demographic Transition model, the Von Thunen model, etc... these are not just things you memorize, but that you understand why they are. And that's pretty much it. The exam is a joke. You should be able to pass easily. Maybe put some more effort if you want a 4 or a 5.