I had the same problem and repetition was the key for me. For the pure memorization things like Pharm and Micro I would spend a few days straight on each and get them done and then spend an hour or so a night with say Gram + one night, then Gram -, or a night on Antibiotics as I was on other topics during the day. I also broke my studying into two blocks getting though everything once in the first few weeks and then doing it all again the second half.
And no, you will not feel as prepared as you would for a normal test. No matter how hard you study you will still need to take some pepto, tums, maalox, or whatever helps to keep from crapping yourself from nerves.
I also agree with Blz that in order to get the score you want it takes a LOT of time and sacrifice and sitting there on days you do not want to. I did 10-12 hour days pretty much 7 days a week for 9 weeks to get my score. In the end, it is a distant memory and the doors to all specialties stay open.