Kyatin,
All the Best Buddy. I know you will do it. I just have two advice for you that I found to be invaluble.
1) Do try new things on the test. For example, if you feel an additional 'it' is incorrect, then don't choose. In other words, try to mechanize yourself. This will help you with the timing in verbal (At least for me. This is my realization).
2) Keep things cool. GMAT will exactly test our talents. If we are 720 guy, we will be 720 guy. Dont try to boost your score on the test day. (I am not sure, but all my practice indicate that any attempt to boost the score always has detrimental effects).
By the way, the error logs I started last week is helping me out in a big way. Thanks a lot!
ALL THE BEST.