What additional resources should I use to improve quant?

[NathanielJ.Ho]

I studied for about 6 weeks before taking my gmat and ended up scoring a 580 (32 Q, 37 V). My target score is a 650 - 680ish, which I was scoring on my practice tests. Actually, going in I told myself I would be happy with a 600, just to keep myself humble. Needless to say, I have a new appointment scheduled 4 weeks from now.

I studied a whole lot of quant leading up to the test. It comprised at least 3/4 of my studying. I am happy with my verbal score and feel like a few sessions here and there will suffice for my next GMAT appointment. Obviously my quantitative is what I have to work on.

I feel as if my quant study strategy was wrong...I felt as if I never truly mastered any concept. I did do many of the problems over and over again to the point where I felt as if I fully understood them.

The materials I used:
Official guide 11th edition
Office guide quantitative review
Kaplan math
Princeton 1012 gmat practice questions
and of course all the Manhattan's

I actually have strong basic skills so a lot of the problems in the kaplan were too easy. I also found 90% of the quant questions in the official guides to be fairly easy.

Is there anything else I can get my hands on that would be beneficial? Would you recommend simply going back over the material I have? If so, which ones should I focus on and which ones should I just forget about?

[StaceyKoprince]

What were your practice test scores (both quant and verbal)? I'd like to know whether both sections dropped a bit or one section dropped a lot.

There is a disconnect somewhere - you said you thought 90% of OG problems were too easy, yet your official test score was a 32 - so we need to figure out what that disconnect is.

How was your timing in each section (esp. quant)? Did you generally move steadily through the test, giving appropriate time and attention to each question? (2m for quant, 1 to 1.25m for SC, 2m for CR, 2-4m to read a passage, 1m for general RC questions, 1.5 to 2m for specific RC questions) Or did you have to rush at times and possibly make random guesses? If you did have to rush and/or make random guesses, on how many questions would you say you did that? Did you do it on a lot of questions in a row or were the guesses scattered? Alternatively, did you move too quickly and finish with a lot of time (>3min) left over?

(By the way, you may still have timing problems even if you finish the section on time. I talk to students all the time who mismanage time between questions - doing a lot in, say, 0:30 to 1:30 and then some in 2:30+. That's still a timing problem, even though the averages work out.)

Where there any differences, in general that you noticed between your practice tests and the real thing?

It is the case, in general, that quality / depth of study is more important than quantity. It's also the case that there are several levels to achieve mastery.

1) knowing and understanding the actual content
2) recognizing what a problem is about
3) being able to execute on the necessary steps to answer the problem correctly, while
...3a) avoiding traps and careless mistakes as much as possible, and
...3b) letting go when a problem is just too hard

Can you give me a sense of which areas on the list above are generally easier for you and which are harder? (And this usually varies depending upon the specific type of content in question - so please do give me as much detail as you can!)