Hey Angicho,
Thanks for your detailed response! I guess I misunderstood what you meant by "drilling one section/week". My apologies
Now that I have a bit more information about what you've done, let me address some of the points in your post:
1. It sounds like you developed a solid conceptual foundation by using the Bibles. That said, I don't think you were able to drill each question type as thoroughly as I would have liked. The Bible Trilogy is wonderful resource, but due to the constraints imposed by its format we couldn't add a tremendous number of practice questions under each question type. As a result, I think you moved too quickly onto timed practice tests. I don't mean to push you into buying even more books than you already have, but consider purchasing at least one of the question-type training we offer (make sure the tests don't overlap with the ones you've already taken):
2. You need to do at least one untimed test each week. Timing is a function of accuracy: the better your approach becomes, the faster you will be. By burning through 20 PT's under timed conditions, you deprive yourself of the ability to thoroughly analyze each question and recognize (1) when similar questions are presented in other tests; and (2) what makes a given answer choice correct or incorrect in this type of question. You didn't mention which particular practice tests you've taken, but for the next 6 weeks I'd focus on more recent ones (2008 - present).
3. Your score variance is too large.
After doing the LR, LG, and RC like this, I started doing practice tests. I've done about close to 20 and all my scores fall within the 151-154 range but I have scored a 164 and 167 on two of them but those are the only exceptions and I didn't approach those two any differently than the others PTs.
A "fluke" is a 156 when your average is 151. In your situation, you have got to figure out why two of these tests went markedly better than the rest. Yes, different exams emphasize different conceptual material, but such shifts cannot account for a variance of 15+ points.
4. Reading Comprehension seems to be going better than LR, but it sounds like you aren't absorbing the "big picture" as well as you should. This often stems from rushing to read the passage without pausing to mentally organize the information you read. Slow down! Take a mental break at the end of each paragraph and think, "what just happened? where is the author going with this?" As with LR, I would be doing both timed and untimed RC sections.
5.
I think my biggest problem is that I know all my weaknesses and I hone in on them and concentrate on doing those certain types of questions and while I get them right during drills,I still get them wrong on the PTs!! It's driving me crazy. I would get tutoring but unfortunately there is just no way I can afford that.
You may
think you know what your weaknesses are, but question type accuracy is only one of several metrics to take into account. What is the difficulty level of the questions you miss? How about the reasoning paradigms that they contain (conditional, causal, numerical evidence, etc.)? If you tend to miss particularly difficult questions and tutoring is not an option, I'd give the Advanced LR course a try. It is perfect for students who are familiar with the Bibles and have mastered the basics of LR, but are still having trouble improving their accuracy on the medium-to-high level difficulty questions:
http://www.powerscore.com/lsat/advanced ... reasoning/.
Also, start doing untimed LR exercises. If you miss 10-12 questions per section, but otherwise have higher accuracy levels, it is clear that you're sacrificing accuracy for speed on the practice tests: you basically spend 15-20 minutes in each section answering questions incorrectly! Thats a double whammy: you waste your time, and you don't get the points. Not to mention that you don't learn much from that experience either. It's great that you're reviewing the questions you miss, but I'd rather you didn't make the mistakes in the first place.
Speaking of which, how you review the questions you miss is also important. Rather than knowing what the correct answer choice is, and figuring out why it's correct, how about this: flag the questions you miss, put them aside for a few hours, and then attempt to solve them again without knowing what the right answers are. The key is to learn to distinguish correct from incorrect answer choices on your own, and recognize what makes the difference in each instance.
Finally, I realize tutoring can be unaffordable. But, do you know anyone who is also studying for the LSAT? Forming a study group with them would be a great idea - nothing replaces the ability to discuss questions with another human being, explaining your mistakes to each other, etc. I was always a strong test-taker, but became even better after I started teaching the test to others. The latter forces you to slow down and deconstruct the arguments in a way that you never would on your own. It's hard to beat that.
These are just some pointers to get your started. Hope they help a bit