Well yes, this can also be very true. Mudphud from what I remember got a very high score, so I would definitely heed this advice. You can work with some very highly recommended books such as BRS Physio/Behavioral/Path (or RR), CMMRS, HY Neuro and Cell and Mol Bio, something for Immuno, Lippincott's for Pharm and Biochem, Lange series, etc. You can choose which areas you need more reference in and select a good resource for those.
You would need to consider your study style and the type of learner you are. Do you prefer to do many questions and learn from them? Do you need to read review books? Maybe a combination of these? Which subjects are you strong in and which need more work?
Also are you generally a good test taker? There was a post from another high scorer (RangerD), who described making a spreadsheet from the questions with high yield info pinpointing areas of strength and weakness and how to work and reason through the questions, so that the logic could be applied to the real questions on the exam. This might be an advantage to doing more questions, in particular if you feel that you need more practice. Also, I guess you build more confidence in answering questions (even with the uncertainty while taking the real exam) and also you can work on timing and pacing.