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I had given GMAT in Jan 2012 and scored 640 with following break up;

1. Quant: 39 (50th percentile)
2. Verbal: 38 (83rd percentile)

My target is to increase the quant from 39 to at least 47-48 and increase verbal to at least 40-41. I am aware that RC is a dampener for me and working hard to improve verbal score.

In quant, I have been scoring 42-44 constantly in MGMAT and GMAT Prep before last appearance. The actual outcome probably showed lack of practice or may be weak fundamentals. Timing is never an issue in both sections.

I have consulted MGMAT Strategy guides(quant as well as verbal- although didn't pay much attention to their CR and RC guides before first appearance), PowerScore CR guide, OG10, 11 and 12. I intend to continue using these resources along with GMAT verbal and quant reviews.

Of late I have found resources available on GMAT Club and BTG very useful for practice.

Please suggest strategy to improve quant and verbal score as targeted. I have got around 40 days to practice. Please do advise the practice resources also.

Edited to add information on how I studied;

Long back (in 2008), I had attended formal class room training for GMAT however due to other obligations, I could not give GMAT. However, I started preparing end of 2011 for giving test first time in Jan, 2012. The outcome was after 45 days of preparations spending around 500 hours.

I picked up books after quite long gap therefore had to spend a lot of time on refurbishing the concepts, which I did with the help of MGMAT guides. Basically I did self study understanding the GMAT pattern and question types. Solving OG 12 question sets, I zeroed down on weak areas, for example, VICs, Number properties and Inequalities. However, I realize that practicing from MGMAT and OG wasn't enough to help me polish my weak areas. Closure to D day, I gave MGMAT CAT 1, 2, 3 and GMAT Prep 1 and 2. Scores were in the range of 610 in one of the first CAT and 680 in GMAT Prep II, which I gave 3 days before the actual test.

While doing preparation, I have always tried to understand the explanation and decided not to repeat mistakes however it seems lack of practice was counter productive as my understanding of methodology wasn't complete.

I have now changed it and focusing on more and more practice. I have gone through discussions on specific question types on BTG and Gmat Club, which I am sure is helping me understand the concepts much better with the help of veterans like Ron and Bunuel (Gmat Club Legend).

Need guidance to navigate through these troubled times.