I only took 3 practice tests, one at the beginning of my review this summer, one is the middle and one the weekend before the exam. They varied as follows:
Overall 33-38
PS: 13-15
VR: 7-10 (I got lucky on the real one)
Writing: I didn't bother with
BS: 12-15
I actually only spent about a month (but it's all I basically did) this summer reading review books (I used mainly Exam Crackers). I mentioned my disabilities above and, despite what people may think based on my score, they have affected things for me. I used to be a graduate student in cognitive psychology/AI stuff, but I completely screwed up (a lot of this had to do with my disabilities that at that point I refused to seek treatment or accomodations for) and was asked to leave with my master's degree. So I have that to overcome on my application, however the experience was slightly positive in that it was a wakeup call for me and it has made me really want to become a psychiatrist and instilled a personal understanding of mental issues.
Anyways after deciding I wanted to do psychiatry I spent a year taking post-bac courses and that's where I actually prepared most for the MCAT's. I posted this in another forum, but I'll summarize it here as it may be useful to you if you are still an undergrad and the add/drop period is still going on at your university. Basically I took classes that further went into areas that I was poor at on the MCAT's.
For physics I'd recommend ensuring you have a good grasp of calculus. If you are able to take a Differential equations course, do so. In the first 2/3 of the course most of the math problems will either be mechanics or deal with electrical engineering (later on you may learn multivarite stuff like wave equations which really isn't useful for the mcats. Anyways you should come out of the course really knowing all of the equations and more over the relationships between them (making it easy to derive stuff you forget).
If chemistry is a problem, and the problems tend to deal with questions that involve calculations (titrations, redox batteries, whatever) then try to take an introductory analytical (quantitative) chemistry course. It shouldn't be too difficult as the math is just algebra, but all the course is is calculating rates of reactions, acid/base stuff and the like. If you can manage a B (maybe even a C) in the class the chemical calculations on the MCAT's will be a piece of cake.
For the biology section definitely take Human physiology (it should be required) and if you can biochemistry. If you do well in those two classes, there should be nothing difficult on the mcat.
Sadly I have no advice for the verbal section. Being dyslexic I was just hoping for a 8 and planning on getting 14's and 15's on the science sections to make up for it. All I basically did was to follow EK's method of learning what MCAT answers look like so that I could get away with not reading the entirity of the passages (I'm a really slow reader).
As for the writing section, I was pleasently surprised, as again with my reading problems I'm a terrible speller. I think what helped me the most was my background in psychology. Even though I was a cognitive scientist, I did have to take a variety of social classes (I was actually forced to TA an intro social course). Most of the questions seem to deal with politics/business/social issues so actually taking an intro to social psychology course, would provide lots of good background information (probably more so than english/writing courses) and are generally really, really easy. While I can't give away the specific questions that were on the July 24th mcats, I'll try to briefly describe their general structure. The first dealt with the role of the media in politics. In an intro to social course a good part of the class will focus on how to change people's attitudes towards something (propoganda and the like) and how people make decisions. You should get to know several relavant studies you can cite, which I am told the reviewers like. My second question dealt with businesses and advertising. Again this is one of the main elements present in social psychology courses (and was one of the driving forces behind much of the research in psychology). Taking a social course should give you plenty of background to include in an essay. Of course the questions on whichever test you take might be completely different, but given what I've seen a social course should be relevant.
Anyways hopefully some of that was useful.
