Just do the problems in the EK 1001 and keep going over the high yield things they say in the explanation like crazy and you should be good to go. The EK 1001 book and the EK Bio lecture book are organized chapter by chapter in each book in chronological order, so do not continue on through the book until you are content with the phase in which you were working on. If that does not work then go and buy TPR Biological Sciences book (Hyperlearning), because you are going to need that book in my opinioin to maximize your score anyway, so start now reading through it like a chapter a day and when you go back to EK to reinforce the material it will be a breaze because of the depth and growth the Princeton Review material takes throughout their chapters.