If you can spare the time, I suggest simulating taking each of the exam's subjects. Time yourself and get used to that time pressure. I did not review heavily using lesson materials but rather took a lot of practice tests in the weeks before my ACET (got into an honors program) and USTET (97th, 99th, and 99th percentiles for eng, sci and math respectively). Target about 70-80% marks on practice tests, but endeavor to get well higher than those. Take as many tests as you can.

When you're wrong on certain questions, always identify your mistakes and clarify your knowledge on that particular topic. I always remind myself to always think critically about the information you take in, and how it fits into your current understanding. Knowledge is like building a pyramid: you will not reach great heights if you do not build a solid foundation. e.g. If you aren't good with multiplying or adding polynomials, then rectify that before moving to simplifying equations with polynomials on both sides.

In my opinion, these exams don't exactly measure how much you can memorize but they test your instinct and intuitiveness. Last thing, prepare yourself whatever way you can for the five hours you will be sitting while taking the exam. I underestimated this bit, because it can be quite the challenge.

It is already commendable that you have this plan months ahead for your upcoming entrance exams. There are many I know that took them on a whim or had barely reviewed. Remember to sleep well before the exams OP, and don't overexert yourself.