I used the Mometrix ATI TEAS secrets and got an 85% and scored within the 90th percentile for my BSN program and the 94th percentile nationally. Ensure you have a solid understanding of your A&P from your gen-Ed classes. Take the practice tests under the same time constraints. Use them to gauge what you know and you don't. Study. Practice, practice, and practice. The more you work those practice problems, you become very familiar what they are about to throw at you. Good luck.