GMAT Strategy

Hi Guyz

Really need your advise on this one. I know what are all the ideal things to do......but just could not follow them( i aint gonna give any exceuses).....and looks like i'm paying for it now

I scheduled my GMAT for the first time on Oct 14.....blanked out in the exam due to excessive study on the day before,anxiety and lack of sleep. So i cancelled my scores,this time more determined to hit the 720+ mark.

First Prep:
I had done most of the concepts this time around in SC,CR,Quant and solved 80% of OG and OG Verbal Review. Though solved only the last 50 problems in PS and DS from OG,coz i was scoring pretty well in Quant.

My Practices test scores(approx):
GMAT Prep 1: 630[Q49 V 28]
GMAT Prep 2: 660 [Q 48 V 31]
GMAT Prep1(Re-take):650 [Q49 V30]

So i thought wotever happened was for the good since i was not touching the 700 mark anyways.

2nd time Prep
I started my prep for the GMAT again after a 2week break.
Powerprep:650 [Q49 V31] (I considered this, test zero and was looking to improve from here on)

Went through the whole of manhattan SC again word by word and solved the corresponding OG10 problems. for about 1-2hrs daily(I could spend more time due to my work schedule)

Gave the free MGMAT (Verbal only) to score V33 (Not dissapointed,at least there was some improvement,though it could have been more)

From there on started a series of tests

MGMAT CAT 1(Quant only): Q40
MGMAT CAT 2: 600 Q39 V33
Quant 39 blew the day light of me....Brushed through some Quant concepts. After that.....
MGMAT CAT 3: 620 Q42 V33
MGMAT CAT 4:630 Q42 V 35
GMAT Prep 2 : 650 Q44 V 35

On reviewing my tests in Quant i realised about 60% of the mistakes are due to careless errors.

Have gone thru some more Quant concepts in the past few days. And plan to take 2 tests this week as i see a steady improvement (Hope to see a 700 before the D-day)

Guyz plz throw some light on the strategy i should follow to reach my target score!!!