Here is my advice based on my strategies.
Quant - MGMAT CAT gives you a detailed report of the areas you are weak in. Look at the reports and take a few days 2-3 to brush up those concepts using your MGMAT guides
and retry all the questions related to those topics from the OG guides.
CR - I would strongly advice you to read "CR Bible" - both CR concepts and questions in this book are excellent. Since you are short on time, you can read only those topics that you are lagging behind in.
RC - Best way to perfect this is practice!! You have to read efficiently - take ~2 mins to read a short passage and ~3 mins for a long passage - make sure you understand what each paragraph is about and how it is linked to other paragraphs - Always cross verify your answers to specific questions with the passage. Try to solve SC questions quickly so that you have more time left for CR and RC, as you have more to read on these questions.
Try to take two MGMAT tests a week and keep studying and practicing those topics that you do not do well on. Also, make sure that you go through the explanations of incorrect questions and make notes wherever you encounter a new/forgotten concept. you can refer these notes on a regular basis until your test date.
You may think about purchasing the additional question pack ($25) from GMAT in case you want to practice more with actual GMAT questions.
Best of Luck for your exam!!
I have planned exactly the same: 3 weeks , 4 MGMAT CATs and one GMAT PREP test. Also current score 590 (Q46 , V 26).
Powerscore Bible (half already done), MGMAT Quant guides ,along with that 10 questions from each sections including RCs , CRs And SCs daily.
I have done all the RC passages from OG -13 and eventually started doing them with 80 % at the end of the RCs but in the GMAT prep I got 3 RC passages continuously and it put me off ...Hopefully it wont be the same in real GMAT.
Can you tell me what all are there in Question Bank of GMAT ?? Do they give 100 questions of each section ?
I am trying my best to reach 670+ target lets c if I can achieve that .Thanks for your kind advice
GMAT 1 - 580 (Q47 V23) a-tight-slap-on-face-149457.html
GMAT 2 - 670 (Q48 V34) 670-one-month-off-from-office-and-2-months-hard-work-163761.html#p1297561
“If you don't change your life; your life will change you.”