Need Help with Identifying My Problem

[bluberry36]

Hello,

I am struggling to identify my problem and improve my score. Below is a list of what I've done -

Almost 2 years ago -
Took a Manhattan GMAT course (and did not study then) and now have no recollection of anything from class

Finally started studying in Feb '08

1) Feb '08 - Took the pre-studying diagnostic test in the OG 11th edition and got a 550. Read/studied the MGMAT guide books (all of them).
2) Mar '08 - Completed all problems once, in an ascending order, in OG 11th Edition, OG Verbal, and OG Math (averaged 65-75% correct). Decided that Math was my problem.
3) Apr '08 - Re-did OG 11th Edition Math and OG Quantitative Math using all the subsets listed in the MGMAT all Math coursebooks. (averaged 85% correct)
4) Apr '08 - Took a practice test using the software downloaded from mba.com and got a 560.
5) May '08 - Purchased Kaplan's 2008 Premier Program and Kaplan 800. Read Kaplan t800 Math section and did all the Math problems twice. First time = 75%, second time = 90% correct.
6) Took a Kaplan paper diagnostic test in Kaplan Premier 2008 and got a 550.
7) Also read and did all the problems in Kaplan Premier 2008 Math section once.
8) Took the practice exam on the Kaptest.com (Kaplan online) and got a 640
9) Started reading Verbal in Kaplan 800.
10) Last weekend - Took a practice CAT test on Kaplan CD (from the 2008 Premier) and got a 560
11) This weekend - Took another practice CAT test on Kaplan CD and got a 550.

Sorry for this long posting. I'm extremely frustrated (and almost feel like giving up. I feel that I do have a core understanding of the Math/Verbal concepts in the MGMAT books, and whenever I do a problem wrong and do it again for a second time later, I learn it and get it, but then I do a new set of problems and I do terribly. I study averaging 20 hours a week. I am or i was shooting for 700. Now I feel as if I have exhausted all my resources and time (planned to take at the end of June).

I know that my weaker part is Data Suffiency (always fall into traps) and Reading Comprehension and Critical Reasoning (fail to recognize main point).

I cant possible do all the problems in the GMAT world nor can I predict what type of problems will be on my test.

I'm not sure what to do anymore.

Thank you for reading.

-Bluberry36

[simplyjat]

Looking at your post it seems that you are not "learning from your mistakes".

You have to devote extra time on your mistakes. Take every mistake to heart, analyze what went wrong. Was the mistake careless or conceptual. If it was careless, how would you be careful next time. If the mistake was conceptual, go through the basics again...