Kaplan's strategy did not work for me at all. Here's why.
Kaplan gears their strategies toward reading their passages and answering their questions. Real MCAT passages, while not always interesting, are not as convoluted as Kaplan passages. When working through a Kaplan VR section, it is in your best interest to construct a mental (if not physical) map of where details are located, because the questions will often ask directly about them, or require you to know them. The vast majory of real MCAT VR questions, however, ask about the main point, or require you to apply it. Making a map literally wastes your time because it directs you to information you probably won't use.
Here is my advice. Ditch the Kaplan strategy, and buy EK 101 Passages in MCAT Verbal Reasoning. The passages in this book are incredibly similar to MCAT passages. I'm not sure what strategy EK proliferates, but don't bother with it. Here's bottom line: read with interest. When you do so, your brain actively organizes the information in such a way that it can be accessed in critical scenarios later on. Sorry if that sounds abstract. Basically, when you read information that is important or interesting to you, you read more efficiently and learn more effectively. Approach a VR section intending to enjoy your reading. Seriously...enjoy it. It will certainly take you longer to finish the passage, but when you do, you will almost never find it necessary to go back and re-read anything.
Using this "strategy," if the correct answer doesn't jump off the page, at least 1 or 2 answers will seem silly. If you catch the author's stance on the issue at hand, and thoroughly understand his or her main point, VR becomes a matching game-- you already know the answer to the question, and now you're just looking for the response that matches it. Of course, questions like "with which of these statements would the author least agree" cannot be predicted, but you'll still know the answer when you see it.
I cannot believe the boost my practice scores experienced (from 7-8 to 10-11 almost immediately) once I stopped with the meticulous Kaplan mapping nonsense, and just read the way I had for my entire life up to that point-- with interest.