This is my personal study experience after doing Kaplan and most of OG.
For example, in reading comprehension they suggest skimming through the passage, yeah right, when you get an 80 liner with twisted logical connections and you just skim, then you will end up reading it twice, losing time. So passages need to be read carefullly first time.
In critical reasoning, I think reading the question stem in the beginning is waste of time, at least for me.
The reason is when you read the question stem, you still have no clue what it is about, so it doesn't stay in your head. So you end up re-reading the question again after reading the argument, losing time.
I prefer absorbing the gist of the argument first, what it is about, how things connected, etc
and then see what the question asks me to do. Kaplan says by reading the question in advance you will know what you are looking for. But it doesn't mean you don't need to understand the argument fully. Once the argument is fully absorbed, reading the question and finding the answer is easy (not always

).
Do you guys try to follow Kaplan 'prescriptions' or you just do what is more comfortable for you, kind of going by your gut instinct?