What works for me personally is to write out the formula every chance I get. With each question write out the formula and when reviewing the answers write it out again. As you do your review, try to think not only of the formula but what the formula is actually trying to accomplish. A lot of the formulas have a lot in common if you pause to think about their use.
I think you’ll find that as you do mock exams that you will see certain key topics / formulas repeating. If you are going to try to focus on certain areas, make sure you know Equtiy and FRA down cold as they combine for about half of the exam.