GMAT Strategy

Hi,
i have the test GMAT scheduled for the 27th of August. My preparation so far has been good. I just took a GMATPrep test yesterday and scored 680 though i got 9 wrong in Quant and 13 wrong in verbal.
I had ample time left even after finishing all the questions in Quant but i was struggling for time in Verbal. I had to leave 3 questions unanswered.
Faced the same problem in Verbal in the earlier practice tests i too.

I felt practice would be the only way to get over the problem but i still havenot been able to come over it. Kindly help me to improve. i am pretty confident about Quant as I have taken a couple of other competitive exams too in the past.

Need guidance!!

Sumanal