Everyone told me not to prepare beforehand, that I'll learn it in residency, but I kind of wish I had reviewed some stuff from Robbins. I don't know if my fellow interns did or not, but I definitely feel like I have the worst pathology knowledge base out of my class. I'm sure I'll catch up by the end, but I still feel like I wasted a lot of time 4th year. I could have read a little and still had fun.
I disagree with reading Lester though. At least for me personally, reading about cutting a specimen (without actually having the specimen in front of me) does me no good. But that is just me.