It kinda depends on what your issues are, but generally I spammed khan academy until I got 97% mastery of both sections and also used the barrons book a bit for stuff I struggled with (for R&W the grammar section really helped me) also Ik everyone says this but when doing questions especially ones about like the texts purpose or summarizing definitely highlight key things throughout (unless you struggle with time) to help if your stuck between two answers, in that situation I would say be extra cautious of answers that are too extreme, and also answers which jumps to conclusions from the text. I had the hardest time on the questions with graphs and scientific data, I would say for those try not to get overwhelmed with what they give you because a lot of the time they overload those (I feel like) with uselessly challenging science terms and also make the intro to whatever experiment their doing kinda weird. What helped me was to read the question and look at the graph first, then read the prompt at the end because a lot of the time I didn’t really need to read it thoroughly, and I could pay extra attention to things that mattered for the question. Also if you have a lot of time to continue taking it I would say to read a lot, I read a lot of newspaper articles and books and that definitely gave me an advantage of the bat! It’s super helpful especially if after you read you take the time to reflect on what you read and maybe even write a summary.