@bb: Thanks for your support. The whole GMAT experience made me realize that you should hear all suggestions,but you are the best person to evaluate and decide on what to do. My best friend used to keep telling me that most people are not able to increase their score points beyond 100,as they hear people tell them it's impossible and they give up.And that there was no reason I couldn't do it if I worked smart and worked hard.He drummed this into my head almost daily:)
@liarish: Wow,what a coincidence!I guess you could remember me as the mad red bull gulper

Thanks for your wishes and I'm sorry that you had a bad day at the test.A bad day can easily decrease score by 20-30 points.I used to get frustrated reading all the stories of people who breezed into 750's with a month's preparation. I know that a 690 score is not a great score,just a ok one,but it was a success for me as I had a huge climb from my first diagnostic. I hoped by writing a honest post that I could give courage to people like me who are currently facing the same situation I did.
@Sachin9: If quants is your weakness like me,then I would suggest that you get good on concepts on commonly tested areas in GMAT quants
https://www.gmathacks.com/math-strategy/ten-important-gmat-math-topics-you-must-master.html.And train yourself to always get the easy problems correct with no silly mistakes. Forget the difficult problems for now,as in GMAT you get difficult problems only after you cross the 600 range.Once you get a decent score in quants, based on your verbal score,you can devise your next gameplan.
@dcastan2: Instructors base their advice on commonly seen occurrences.But the great thing about the GMAT is that is not a IQ test,but a strategy test.So after honest evaluation of your strengths and weakness(instructors don't know you as well as you know yourself though they can offer great advice),you can devise a great game plan.Since this is your last week,I would suggest you watch the video everyday.Try to be clear at least a day before test how you're going to play the GMAT. You should play the entire process in your mind..like if I see a probability question which i can't figure out in 30 secs,I'll guess...if i felt i did quants section badly ..i will wipe this thought out during the break.All the best and keep us updated!