Hi Alanna,
Thanks for the question! The places where you see memorization suggestions are typically lists of indicator words (like premise indicators or conclusion indicators). I suggests memorizing those because it is a fast and easy way to take a big step up in understanding!
With the rest of it, what you are looking to do is ingest that information and adopt it as part of your view of reasoning. That's more than memorization or even being familiar with the ideas; it's instead the process of making it your own and making it second-nature. The goal that I have for you is to know it so well that you could teach the ideas to someone else (and idea I talk about in point #6 here:
https://blog.powerscore.com/lsat/retaki ... our-score/).
To help assist with that process, at the end of each chapter I have a brief Review section that hits the key points in each chapter. If you know those--and know them well!--you'll be a long way towards the goal of understanding all these ideas at the fundamental level. then, just practice regularly with them and you'll slowly get fast and stronger with the ideas. It takes work at first--and it slows you down even--but eventually you'll speed back up and be even better. As I say in the Justify chapter, "Remember, techniques that require a number of steps seem daunting at first (think about your first time driving a car). But as you practice with each technique, you will get faster and eventually your application of the technique will be transparent and effortless. To reach that level takes practice, but the rewards are great."
Thanks!