1) I've been reading the MKSAP books (one per week) for the bigger topics per the ABIM Blueprints percentage (so, cards, endo, pulm, GI, ID, and rheum) and making flash cards from them using ankiapp for easy list type questions or just straight memorization topics. Probaby not the most efficient way, but I did really crappy on the ITEs and I had the time, so that's what I decided. Along the way, doing the MKSAP and UWorld questions. For the remainder of the subjects just gonna stick with BB.
2) I doubt there's much difference between MKSAP 16 and 17 to make a difference for passing or failing, but I have MKSAP 17.
3) I have the MedStudy flashcards. I think they're good for just a general pattern recognition (for instance, a rheum one just flat out says "pregnant patient presents with pain over the radial wrist and hand, worse when pinching or grabbing, and positive Finkelstein test - the backside has the dx/labs/tx) but probably not that great for just rapid fire stuff like antibodies or things like that.
Just my two cents.