^I second that! Nothing works better than a lifetime of extensive reading!
But I disagree with @samram – first of all, it is NOT that easy to prep your way to a top math score. You can prep your way to a HIGHER score, but I’ve never seen a student prep their way to higher than 700 in math who didn’t also have plenty of talent (whatever that is). And the idea that “[over prepping] has blurred the line between effort and ability” reveals a specific world view that is debatable to say the least. If the goal of this test is to somehow predict future achievement, why would you want to filter out the effects of hard work? In most fields of endeavor, hard work is essential and it is rewarded. If anything, the bias against effort (and the use of the label “try-hard” as a put-down) is actually an insidious trend.