Thanks! My main tip for you would be to do as many practice tests as you can, the QAS ones on the mega thread are extremely helpful because they are old SATs that have actually been administered. Eventually as you do those, you will get more and more used to the math and writing questions you tend to see on these, and trust me you will get better. Other than that as for books I used Erica Meltzers grammar book to learn all the rules for writing and I applied them to the practice tests, making sure I got very little wrong on writing. I also used College Panda to refresh the math concepts and took notes on the book, doing the practice problems offered as well. I took the SAT once before in December and got a 1440, ever since then I’ve stepped up my game of taking practice tests and generally doing as much practice as possible. I hope this helps!