<p>Take it again because it seems you’re interested in the top schools. If this was a molecular biology program or a social science program then it wouldn’t really matter. But because it’s a quantitative heavy field, it will matter to a certain degree. You only apply once in your life to grad school, and this is something that will impact your life for a long time. The math section matters for quantitative heavy fields, and may become a deal breaker if research experience/LORS/GPA between two applicants are close. This is especially important if you don’t come from a very well known school and you’re shooting for the top.</p>
<p>And I think all it takes to get to the 800 is practice, practice, practice. Make sure you practice in test-like conditions and you time yourself with every question/setting. Also, always take notes when you read the questions, and if you can afford it, re-do the early questions twice to absolute make sure that you’re not making any dumb mistakes (misreadings, calculations…etc).</p>