It has helped me to focus on certain topic areas and be selective in the first two weeks of studying. i.e. study for one day on heme-lymph, cardio, and vasculitides. Then do a selective test on that subject matter the next day and go through all the explanations. Repeat for the next few days on pulm/renal, gi/endocrine, neuro/musc/skin... etc. Now that I've been through all the sections, and have begun to start the larger random samplings, I have maintained my scores pretty well.
Gotta' build the base with the focused studying first before taking on the whole thing at once. Just my two cents.
Best of luck to you all... my test is this Thursday the 1st of June.