ACT! SAT! & PSAT!? HELP PLEASE!?

I got a 181 sopre year and a 218 score junior year. This is what i did in the summer in between. I used the sparknotes sat book to learn all the rules for writing. This brought my writing from 55 to 75. i brought my Critical reading from 59 to 73 by doing a few practice tests in the official sat guide released by college board. I did a couple practice tests for math from the same book and i only raised that by 3 points to 70. If you do what i did and maybe a little more, you should easily get national merit. Good luck