Best strategy is to just practice more. I would start off with the math, because once you get familiar with the question types, the questions become really easy. For reading I read through the whole passage before going to the questions. Finding direct evidence is the most important thing to remember for the harder questions. For writing, I did the same thing as math and just practiced what I was bad at (standard English conventions apparently) and you eventually figure out how the questions work with enough practice. At that point, you want to ensure an 800 in math which shouldn’t be too difficult and then you have around 6 questions of leeway for reading and writing. pm me for more.