Best investment for GMAT Prep - 590 to 710

I am a non-native speaker and gave my GMAT about a year ago. I scored a disappointing 590 Q45 V28 on the test. It was the test day anxiety that really got to me and I failed to solve the problems that I could've gotten right. I emailed Scott and Jeff about the situation. I performed a memory wipe against everything I knew for the GMAT and started fresh with each fundamental concept and practiced accordingly. I was recommended to take a practice test each week but I was still lacking the conceptual clarity.

TTP is made for clearing your conceptual gaps. I don't think I even needed to look at any other question banks except TTP questions and OG practice questions. Once you start hitting more than 80% accuracy in TTP practice quizzes, solving an OG question will be a relaxing experience. The similarity of questions in TTP Quant to the OG questions is remarkable, not that they are copied exactly as it is but that they are quite different and have some kind of different gravity to them in that if you solve a TTP question and later you were given an OG question of the same type, I guarantee you can solve it.

Another thing was the timing in solving a question, something in which I was really bad. You can checkout an article about this on TTPs website, the first recommendation is to SLOW DOWN while solving, something which I directly started to practice. In my second attempt, I didn't care about timing while solving a QUANT question. What I needed to know was
1. Do I know the concept behind it ?
2. Have I solved a problem like this before ?(which you might have if you've used TTP)
3. Is this my weak area? or Do things in these type of questions go wrong for you?
If I had answers to all three of them, which I guess you will have if you've practiced and reviewed enough, I would just go ahead and start solving it. Once I reach an answer/conclusion on DS question, I used to look back once and submit.

Jeff has been a great mentor, he gave me a detailed plan on how to go about preparing for your test. Marty is also a great guy, his recommendations for RC and CR have helped me a lot and I cannot thank them enough. Essentially TTP is a great course and you should definitely add it into your GMAT Prep if you want to crack that 700 mark!!