The most successful students review early and frequently.  The sooner you begin this process, the more quickly you will recall information on the test in the spring!  I recommend that you invest in a review book as soon as possible, and bring it to class on a regular basis.  This way you become familiar with your guide and can look back on notes from earlier in the year when you prepare to review.  I really like the following test prep book, however you can click on the image for a link to other resources.  Just be sure you purchase one that has been published prior to 2012, otherwise it will not reflect the current AP Biology curriculum.