My 10 year old has poor study habits, any advice?

I'm at the end of my sopre year in high school, and all through the lower grades I had no trouble with keeping up, never studied, and did great. Math isn't my strong suit, so that is something I have needed to start studying for, but besides that I don't have too much trouble. Sometimes a big test will come along in something that has a lot of memorization, but the way I remember things is by writing them down once or twice, and then I'm good to go. Mostly I only ever study for midterms and finals. I know I'm not a parent and it might not be my place to say so, but if he's doing good right now, it might be best to let him be. He sounds like a smart kid, and when the time comes he will probably realize if he needs to look things over every now and again. And if he doesn't at first, he will after getting a not so hot test grade, and kick it into gear the next time. At least that's how I was. Hope I helped!