Just a few quick things that might help:
1. If it has been a year since you have worked on the OG (and because there so much other official material) then you may want to put away the non-official material and get back to the OG and other oiffical materials
. Also, go ahead an get the digital version of the 13th edition so that you have the newest questions and are always working off a computer screen. Unless yo have unlimited time and really need the basic practice I would skip at least the first 50 in PS and the first 30 in DS.
A few other worth while official materials:
Quantitative review Second Edition (Depending on how you are scoring you may want to focus only on the second half of these questions)
Verbal Review Second Edition (I would solve all of the SC but you may want to skip forward on CR and RC depending on how you are doing)
Question Pack 1 - Focus on Medium/Hard questions (you can select the difficulty)
GMAT Focus - These are fantastic with a week or two of your test
9 GMAT Paper Tests - Awesome for verbal practice. Decent indicators of where you are scoring in verbal.
GMATPrep Docs - The full question banks for the GMATprep tests
are here on GC. They are great once you have taken the tests a bunch of times and just want to make sure that you have seen all of the hard stuff or just want extra official practice.
2. It sounds like you may not have put your error log
to good use. It really helps to analyze content/questions that gave you trouble.
A nice way to do this is to take screenshots of questions that you got wrong or just took a long time to solve. Put all the images in a folder and visit them weekly to re-solve. Once you have mastered something then take it out.
3. Start practicing both Quant and Verbal now.
Even if you focus more on Quant still get the verbal muscle moving because it usually takes longer to get in shape. Maybe you will get more improvement from verbal? Who knows.
4. Work through the MGMAT CATs and the GMAT Club CATs.
They are both good for different things. Keep an error log
for these as well. I would just focus on the Quant sections of these tests and stick to all official questions for Verbal.
Let me know if you have any questions! Happy studies!
"It is a curious property of research activity that after the problem has been solved the solution seems obvious. This is true not only for those who have not previously been acquainted with the problem, but also for those who have worked over it for years." -Dr. Edwin Land
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IMPROVE YOUR READING COMPREHENSION with the ECONOMIST READING COMPREHENSION CHALLENGE:
Here is the first set and some strategies for approaching this work: http://gmatclub.com/forum/the-economist-reading-comprehension-challenge-151479.html