Honestly, it's the scores x/1600 that still really matter. I didnt crack 2000 overall, but I still got into everywhere that I applied, and with honors college everywhere as well(save one, but i didnt send them my new scores afterwards, when I got my highest score).
I got a 1310/1600, and that's where it counts(750 math,660 reading).
But, this isnt the place for me to just brag, but rather, just say that you just need to focus on the right sections to do well, and to do excel in the right sections.
Things that I know are in the Princeton(im pretty sure, and I LOVE the princeton series, and shall be using them again when it comes to GMAT time).
A question in math(or anywhere) that is the equivlant of 2+2=4 is worth the same as cos(theta)=23arcsin(theta plus x)^2
Work on easy questions, because they have the same rewards as the hard ones.
KNOW the directions, dont waste time reading them. The directions dont change, they really dont, so memorize them beforehand, and use the time.
Some people say eat a healthy breakfast beforehand, I say dont. Eat whatever you normally eat before schools or exams, so you will be used to it.
Also, worry about getting questions correct, not the number you do. But also, skip and come back.
Also, if your math scores are problematic, then take a math sat review course at a local community college or the like, theyll teach you what you need.