Depending on how much time you have left, I suggest getting the Princeton Review book and spending some time on it. Focus on the type of math questions they ask as well as how the test is formatted and how the grading works. Knowing these things will help you the most.
Take your time at the beginning and make sure to get the beginning questions correct and you’re guaranteed a decent score. I did fairly well on the test by making sure to do well at the beginning (because these are weighted).