I went from a 199 to a 252. Basically I relied on the goljan lectures and kaplan qbank for step 1, and was let down pretty hard on the test. It was nothing like what I was expecting, and since I was getting ~85-90% on Qbank the night before the test, looking back I think that was useless and sort of a rip off. Supposedly USMLEworld is making a qbank for step 1, I hope so for all of my friends who will be taking it soon.
I finished my last rotation of 3rd year on a friday, and started studying the following monday. I was scheduled to take the test in 3 1/2 weeks from that date on a Wednesday. I started with the kap videos, all 200 hours, and watched them all in about 9 days using a video program that had an option to adjust playback speed. Watching the videos at about 1.6-1.8x regular speed and following along in the written notes, I tried to watch about 12-15 of the videos a day. After that, I started USMLEworld, with about 2 weeks left to go. I did about 5 tests a day, 46 questions each. That's not many, but I read each and every explanation to try to understand them. If I didn't understand the questions, I would go back and read the notes for that area (cardiology, ID, etc). I think that helped a lot too, following up areas I was weak in with a focused study session.
I managed to complete about 1800 of the 2200 (or thereabouts) questions in USMLEworld, plus a few other things when I wasn't near the computer (such as the "PreTest" step II question book of eight 50 question tests).
Hope that helps. It worked for me, much better that what I used for Step I. I would definitely swear against Kaplan's Qbank, to me it was way too easy and did not prepare me for the test. I always thought I was able to do better than I did the first time around. Maybe I just got lucky, but if you're like me and determined to do better, you can definitely pull it off.
The best piece of advice I can give you, if you'll let me do so, is to find something and stick to it. The videos and UW questions worked really well, but whatever it is you choose, stick to it from day one and don't chase rabbits. Take some sleeping pills if you have to the night before...BUT GET SOME SLEEP! I fell asleep during step 1 several times, causing me to not finish question blocks. The reason I did this is because I stayed up all night the night before worrying about how I would do.
I'll shut up now. Good luck, seriously. I hate the NBME, and I think their tests are useless and (as I've helped prove) neither reliable nor valid.