Hi thanks to both.
"How to get a decent score" by a normal student.
This is only for normal people, if you are genius and see things like in the matrix movie please go and see other post with the subject like "how score 780"
Background: I am not an English native speaker (Argentinean) and I have engineer degree. Six year of work experience.
My first attempt to the gmat was in December of 2008. I scored 610 (Q47 V28). I realized that I need a lot to improve in verbal so I decided to start preparing the TOEFL first and then return to the GMAT. I spend all 2009 working in my English and trying to improve as much as possible. I took the TOEFL exam in December of last year and I started studying for GMAT again in March 2010.
I also enrolled for the Knewton course that was VERY helpful for me because it allow me to remember key concepts of math and gave me a lot of exercise to do. I enrolled in the Knewton course because of the 50-points guarantee policy. I am glad to tell you that I am not going to ask for a refund.
The course was great and I did it in only one month. Of course I had to watch a lot of the lesson on-demand.
About practice test that I took:
I took the 5 Knewton's Test and I score on average 610. Before the exam I was worried over my performance. But now, I can tell you that Knewton exam are much harder than the real GMAT exam is.
I also did the Manhattan free test, and again, for me there were some exercises that were harder than the real ones.
In my first attemp I also read the Manhattan SC and CR guide. These guides were fine, but to short for me and without to much practice to do (only from the official guide).
Finally, I also use this forum a lot. It was a great help. There are a lot of experts with great tips and very useful information.
But be careful about the amount of information that the site has. I think that one of the key is to to select only useful information!!
On the test day: Just think about what you are going to do next after the test.
If you are interested just let me know and I will provide further details.