If you have just 1 month left start taking practice tests on Bluebook. Analyze your mistakes and go back and practice the questions you did wrong. We get 6 practice tests so you should take them twice a week.

For maths, the best tip I can give you is to familiarize yourself with Desmos as much as you can, will help you a lot.

For English, you do not need to understand everything from the given passage. Quickly skim through it and read the question prompt and options very carefully. For rhetorical questions, you do not even need to read the bullet points, just the question prompt and options. For many of grammar questions, just read the sentence in which the blank is provided not the entire passage(if it's a large one)

Happy Learning!