I recommend that you try practice test questions you find online, as well as anything else regarding the material that you find. Use your resources.
Try online quizzes and flashcards based on the Geometry EOC. Learning formulas and ways to solve problems is a great way to study.
Make sure that you know about the structure of the test, and what the structure of the questions are. This will help you to not be afraid nor surprised at any questions come test day.
Use online study guides that walk you through a lot of the content, there are many schools who have published guides that help studies quite a lot.
Hope this helps.