I haven't taken it yet, I am still preparing like you, but the one thing I can share that I'm doing that I think is helping me is I am writing down and making flashcards of any problem I get wrong because of a trick so to speak. For instance, one thing I commonly get wrong is on data sufficiency questions that involve fractions. One question asked if (x/y) was greater than 1. The first statement said that (x/y) = 5/4 and the other statement was clearly insufficient, I choose A because I failed to remember that if both x and y are negative then it can still equal 5/4 and be less than one. So I made a flash card essentially reminding me to consider positive or negative values when evaluating fractions with DS questions. Hope that is somewhat helpful.

Statement 1 : X/Y = 5/4

You chose A (statement 1) and got it wrong?

What was statement 2?

skang357 wrote:Statement 1 : X/Y = 5/4

You chose A (statement 1) and got it wrong?

What was statement 2?

yeah sorry. I meant to say that the question asked if X was greater than one, not if X/Y was greater than one. The second statement was only dealing with Y and didn't give you any insight into what X would be.

Thanks!

I will be glad if some one can give me a proven strategy to improve from now on!

Kaplan 800 does not contain very difficult problems. Tough problems can be found in the challenge archive of Manhattan GMAT. To improve CR questions you could work some Logical Reasoning problems from the LSAT. These problems tend to be more difficult and often provide better practice.