Cliff's Notes AP helped me. It really narrows down the basics which for me, was important. I started feeling overwhelmed as I looked through my AP notes seeing all the information, but being able to focus on the main ideas and terms really helped me and I got a 95% on the AP section. Also, the HESI study guide by Elsevier was good as well. I hear a lot of negativity about it, but I feel that if your using the study guide as a review, and not trying to reteach yourself all the material, it's a good resource.