scored better than expected - how do I improve even further?

So basically, from my Junior year PSAT I was estimated at a 1640. Near the end of my junior year, I studied for the Math section for maybe three weeks, took a practice exam, and achieved a 1900. That was my goal for my actual SAT that I took a week later.

I ended up with a 2040
CR: 710
M: 610
W: 720 with a 10 essay

Now that I now I’m capable of scoring upwards of 2000, I want to do even better. When I was studying for my SAT, I skipped certain types of difficult questions in the Blue Book because I didn’t think I had the time to learn what appeared to be new concepts - so I’ll be going back and working on every question type, no matter the level of difficulty, in order to prepare for the Math section. My main goal is to raise my 610 to as high a score as I can.

But I also want to raise my English scores. I didn’t study at all for these sections, though I was fresh out of AP Lit when I took my SAT. Is there any way I can try to improve them? Statistically speaking, I know it’s very unlikely, but if anyone has any tips I’d be grateful. I’ve decided to apply to Brown as a reach, and I know I need to get my scores up if I want to have a real chance.