I took GMAT 3 times so far and I am giving GMAT one last time in 3 weeks. What can I change this time around in my prep for verbal? My target is

to get 49Q and 35V = 700.

1st attempt: Sep 2009
Prepared for 4 months using MGMAT Verbal, OG Quant, OG Verbal, OG Verbal Review
Scored 590 [V23,Q49,AWA4]

2nd attempt: Oct 2011
Prepared for 4 months using MGMAT Verbal, OG Quant, OG Verbal, OG Verbal Review
Scored 620 [V26,Q49,AWA5]

3rd attempt: Mar 2012
Prepared for 2.5 months using MGMAT Verbal, OG Quant, OG Verbal, OG Verbal Review, CR Bible, GMATPill SC/RC
Scored 560 [V23,Q45,4]

Observations @ 3rd time
1] I was exhausted and my mind was numb while writing AOA. My AOA was sub standard. I could hardly fill anything.
2] I never scored below 49 in any of my mock or previous attempts. I felt quant was very tough.
3] I was very confident and comfortable with the verbal section during the exam. However, i remember that I went blind on last RC and at least 4 questions in the end. My final score plummeted my confidence. It took me 3 days to recover and muster courage to reapply.

Mock test on 3/25

I took a GMAT Prep 2 yesterday and scored 660 Q50 V31. Since many questions are familar to me i would substract 50 points and this places me where i was in my 2nd attempt i.e 620. I really really need to improve my Verbal Score. Can you please suggest what I can do?

My general strategy in brief -
I divide my time in 15 min slots for V & Q. The number of questions I try to answer in each of these slots are [V 8-8-9-8-8] [Q 7-7-9-7-7]
Verbal: I went blind on last 8-9 questions in Verbal => I am trailing by 15 mins in speed.
Quant: I was running out of time on last 7. I did answer q alternately.
Number of incorrect answers in each 15 min slot are [Q @ 1-1-1-2-3] [V @ 2-3-3-2-6]
What do i need to improve here?

My plan for next 3 weeks

Wk1: I have an error log for GMATPrep/MGMAT/OG. I am planning on going through all mistakes.
Wk2: Take GMAT Prep / MGMAT tests every day. Analyze mistakes/timing.
Wk3: Take GMAT Prep every day for 3 days and do nothing for the last 2 days before the exam.

What else can I do to improve my verbal score?

Thanks in advance for your feedback.

I am losing a lot of time on 600+ level RC questions and 650+ level CR & SC questions.

This is my strategy for 4 RC questions that show up in the exam
RC#1] Read the passage RC Pill style. Try to answer all q correctly. [However most often i get not more than 50% correct]
RC#2] Try to answer all alternate questions correctly.
RC#3] Try to get only the general questions correct.
RC#4] Go blind.

My accuracy is falling steeply after question # 30. I am hardly left with 5 mins by the time i get to last 8 questions. Almost all questions in the last 8 end up incorrect. [I have attached my latest GMAT Prep 2 results.]