I just took the family medicine shelf yesterday. It was my first shelf/rotation and I have to say I found it difficult, just because it was SOO random. I had a little bit of everything some peds, psych, derm, endo, heme/onco, ethics questions where they give you scenarios and ask you what is the best approach, some preventive questions (vaccines, hypertension, weight loss, screening etc), 1-2 gyno questions, and like 3 biostats. I essentially did everything I could for this shelf..AAFP questions (theres like 1000 or so I ended up finishing 600ish), I did all the pretest questions (500Q), blueprints Qs ( they have 100 questions on the back of the book), I read ambulatory section of Step up medicine twice, read some pertinent chapters in step 2 secrets and I've read through case files once. Overall, I would rate it based on a value of 10 being the most helpful: case files (7/10), AAFP questions (8/10) and if you have time do the blue print questions (6/10). But even then some concepts were not even in the things I've covered. I had to tap back into my knowledge for step 1 to answer some questions that were mor basic science type questions (anatomy, behavioral type questions etc). I feel if I had done internal med rotation before this I would have found it pretty easy, since there was some endo, pulmo, GI, heme/onco, topics in this shelf asking you next best step or some very specific details. Good luck to everyone taking this shelf. Hope this is helpful! 🙂