Kamila P. answered 26d
Columbia Engineering Grad with 10+ Years of Math Teaching Experience
1) Take a practice test on Bluebook (online) or collegeboard.com (paper) to gauge your baseline score, time management, as well as your strengths and which sections/topics you need more practice with.
2) Watch a few YouTube tutorials on Desmos. Being comfortable with Desmos can save you LOTS of time on challenging graphing questions and problems that require you to solve difficult algebraic equations.
3) Familiarize yourself with test-taking strategies such as backsolve and plug-in if you get stuck. I am also a big fan of annotating the problem, e.g. underlining key information and circling the question so that you can ensure you are answering the question being asked (for example, a problem may ask "what is 2x+5?" and of course a common trap is having the value of just x as one of the answer choices).
4) Take another practice test and watch your score improve!