One of the best ways to study is using the AP review books, but there are many to choose from!
There are the “Crash Course” AP review books. These books are best for last-minute studying because they are known for containing only the information necessary to pass the exam. They do not go into detail but they do have a practice exam, which can be accessed online.
The “Kaplan” AP review books give an overview of the material, so it’s not comprehensive. Most of the books contain a couple of practice exams. They also include advice from AP teachers and students who took the exam.
“The Princeton Review” books are the most popular. These are known for giving a more comprehensive review of the material. Most have two full-length practice tests and strategies for taking the exam.
The “Barron’s” AP review books also contain practice exams and for most, contain an online practice exam. They cover all topics in detail, which makes them almost like the actual textbooks. Therefore these are not for students who want to do last minute studying.
The “5 Steps to a 5” AP review books focus mostly on the test-taking methods. Also, most include different study plans. They do not focus on covering all the material. These are less dense and good for studying about a week before the exam.
These aren't the only AP review books out there but these are most well-known and the most used. Other than the prep books, there are also some practice questions for all of the AP courses provided by the College Board.
Another great source of studying is CrashCourse on YouTube. CrashCourse has videos that cram in tons of information in about ten minutes. Most of the courses offered as a series are humanities or science. This source is great if you want to review topics in a small amount of time.
Make sure to use your time wisely and not give in to procrastination. The best way to study is to make it fun! Find what works best for you and remember to relax.