Obtain test preparation books that contain information for the world history potion of the SAT II. These books can be purchased or may be available at your local library. Your guidance counselor can recommend books for you, or you can check out the list of recommended books from Parents and Kids.com.
Get practice world history SAT II exams. Practice exams are often included in test prep books, and you can also get them from your guidance counselor. Websites, such as College Board.com, also offers a practice test for the world history SAT II.
Utilize your study materials. Go through the test prep books carefully. Start with subjects that you are familiar with and review them. Then dive into those areas of history that you have not studied. Since the SAT II covers world history from a very early time period, you will likely not have studied all the areas. This is nothing to be intimidated by. Study what you can before the test. You can get the highest score of 800 without getting every question right in the world history section.
Take the practice tests. Generally, each time you take a practice exam, you can get a higher score. This means you should take a few practice tests for the world history SAT II before the day of the actual exam.
Go over the questions you did not know or got wrong on your practice tests. Once you take the test, go back through and grade yourself. Questions you guessed on and those that you marked incorrectly reflect areas that you may need to study further before taking the actual SAT II exam.