Kaplan came to my school and gave a shpeel about how the 'prepared student' will start prep for step 1 six-nine months ahead of time. this put the fear of god into me and i always felt guilty when i was putting more time in on my classes and not studying for boards. turns out, this was the best imaginable thing I could have done. The true prep for step 1 comes from excelling in 2nd year. you must learn pathology inside and out, and also pay good attention in micro. The key books for step 1 are (in no particular order):
First Aid
RR path by Goljan
Clinical microbiology made ridiculously simple
Robbins question book
BRS phys
Qbanks in order of usefulness: UW>kaplan=usmleRx
Useful supplementary texts are:
lippencott biochem
lippencott or lange pharm
HY neuro
HY behavioral science
To reiterate, the absolute key to doing well on step 1 is to kill second year and learn path like your life depends on it.
I am the sort of person that learns slowly and must reread things many times in order for them to sink in. That said, I felt that 4 dedicated weeks at the end of second year was enough to prepare for step 1. anything more was overkill and burnout sets in. I was told this same thing a year ago and didn't believe it. I felt i'd need 6+ weeks to study and i was dead wrong. Just don't buy into the kaplan hype machine that says you need to start studying for this thing 9 months ahead of time. Spend your time learning path!!