For PAT, take a generator for like maybe a week or so before starting your full PAT exams. It helped me with visualizing a lot of things that I thought I never could learn.
Math: Work on math destroyer everyday, even if it is only like 10-15 problems a day. If you do a lot of exams early, you might feel too confident that you won't ever touch math again. We all know that sciences are more important, so you might drift off and focus 100% on the sciences. If your exam isn't anytime soon (<1 month), then you should try to do 10 math problems a day. Then you can crank it up when your exam is really close.
Biology: Work on DAT destroyer and review what you do not know with notes. If they mention the word aneuploid, you should ask yourself. Hmm, where have I seen this? What can they ask me? Do i know the process? If you can't answer any of your own questions, then you should review it again.
Chemistry: Review Chad's notes, take the 370 question quizzes before heading to Destroyer. Do not take longer than 3 hours doing 370 questions, you will notice some questions are repetitive. That's when you should do the math mentally, and press view solution. I like the feature where you can click on the answer, and it tells you if it is wrong or right. As you are reading your notes, highlight the ones that seems important or something that you will always forget. For example, I would highlight that H2SO4 dissociate strongly because it is a strong acid, but more importantly that it is slightly more acidic because of the extra Hydrogen. When I was first studying, I would always forget. Now it is just stored in my memory. That way, you can always look at the highlighted stuff when you are studying. You will be like oh yeah, that's why I highlighted that.
Organic Chemistry: I would do exactly the same as above for general chemistry. In addition to that, I would look at road maps daily. Box the products/reagents that you are not familiar with and review those more than your other reagents. There are some that you will just automatically know because you've encountered them so many times, for example Br2 on an Alkene. Others, you may not have encountered it, so you should look at that more often since it can appear on the DAT.
Reading: Find a method and stick with it.
Good luck!
