If you are taking the test soon the best advice I can offer you is STUDY, STUDY, STUDY!!! After weeks of studying for the TEAS, I passed with an 80. I used the McGraw-Hill's Nursing School Entrance Exams to study for the test. Although it may seem extreme, I studied between 4-5 hours daily for about 3 weeks. The official study book is the ATI TEAS Review Manual but I did not want to pay $25 for it. Use your time wisely, study faithfully, and do all of the practice exams. (I ran out of time on the math portion so it is wise to time yourself on the practice exams.)
GOOD LUCK!