Hi,
The Princeton Review material is excellent, although I was not very impressed with the lectures. I spent like 10 hours a day studying for the MCATs over the course of a month. I would start off my day by spending an hour reading various articles from the New York Times, ie articles from the front page, from the arts section, health section, editorial, etc. Then, I would drive to the library with my Princeton Review material, and test my comprehension of the NY Times articles during the drive. At the library, I would read the Science Review book, answering all the questions contained within the chapters, and fully reading the explanations (for any questions I answered, right or wrong). After I finished a section in the science review book, I would answer the corresponding passages in the workbook. I would also devote an hour or two to passages from the verbal review book.
I spent the last week doing Princeton Review and official practice exams. On the official exams, I was scoring pretty close to what I ended up actually scoring (39 S). I think the key to doing well is doing as many passages and answering as many questions as possible. Incidentally, I scored like a 24 on the Princeton Review diagnostic.
That's what worked for me. Hope it helps and good luck with your studies,
--Vinoy