One of the biggest challenges in AP World History is keeping all of the events you're learning about in context to one another. Help yourself keep track of these events by keeping a timeline. Create a timeline in your notebook, or on posterboard in your bedroom. As you learn about a new event, place it on the timeline among the others you have already learned.
Index cards are useful study tools that can prove invaluable in AP World History study. As you move throughout the course, write down important names, places and terms on the fronts of index cards and their meanings or significance on the backs. By making these cards as you move through the class, you can more effectively build your knowledge throughout the class instead of trying to cram it all in right before your AP exam.
Another effective way to segment your knowledge, and as a result make it easier to remember, is to sort the information by continent. Because you learn about events and people from around the globe in this course, it can be easy to confuse them. Each time you take note of a new important event or person, make a notation in the margin of your notes telling yourself what continent the information pertains to, which will help you mentally sort the newly acquired information.
If you find your history study a bit boring, spice it up by reading some historical fiction. While you obviously can't depend upon fiction for factual information -- even though most works will contain some -- reading historical novels during your free time may increase your interest in history as a whole.
Don't tackle the task of studying alone, but instead partner up with some friends. Ask others in your AP World History class to form a study group. Meet with these equally academically-minded individuals throughout the course and study in a social setting to make the process a bit more enjoyable for all involved.