The tax part you just have to know the rules and how to apply them. There is no way around it so practice the MCQs like crazy and know important stuff like what qualifies as a medical expense, the rules for tax free gains from the sales of your primary residence, the tax rates for capital gains depending on income, etc.
The biz law part is too big to know in detail so I reread the whole chapter on it the day before the exam and scanned over it the morning of the exam. It might no work for you but for me the recall is much more easy and I can more easily detect wrong answer choices on the exam if the material is recent and fresh in my mind. You do have to read the biz law and answer the practice questions way ahead of time. The last minute reading is to recall easily; NOT to learn it the first time around.
I also watched the biz law lectures the morning of the test and it helped greatly. They tend to ask obscure minor details and knowing the big picture will not help you there. Obviously, you should know the major stuff like the difference between factoring, pledging, or assigning things like A/R and things like having a general idea of the pecking order of who gets paid in what order in an involuntary bankruptcy/liquidation.
If there is one thing you just do not get do not dwell on it and shatter your confidence. I never understood the Corporate AMT calculation but still managed to pass REG. In other words, don't waste time on one weak area at the expense of areas you are good on but can become an expert by spending time on them instead.
BEC 11/29/14 77 (Roger)
AUD 2/23/15 60 (Roger) 4/13/2015 83 (Roger & Ninja MCQ)
REG 5/30/2015 66 (Roger & Ninja MCQ(7 hours only)) 8/23/2015 78 (Roger & Ninja MCQ)
FAR 11/23/2015 60 (Roger & NINJA MCQ) 2/24/2016 74 (Roger & NINJA MCQ) 5/25/2016 83 (Roger+Roger CRAM & NINJA MCQ/NOTES)
Texas Ethics Exam 92%
Licensed TX CPA Aug 2016