I passed my surgery and IM shelves while barely studying. I wouldn’t recommend this approach, but I was in the hospital 60-80 hours a week and spent all my spare time trying to be fun and convince my wife not to divorce me. The point is if I passed, you’re gonna be fine.
But some advice- don’t stress over being the perfect little med student. Do what you need to do to study for your shelf exams.
Also, just start early and be consistent, especially on surgery. You’re really not going to want to do UWord after a 16 hour day, but 20 questions a day adds up. The flip side is also true, if you take a break for a couple weeks it’s really hard to catch up.
Also, it’s probably worth it to study IM on your easier rotations a little (like psychiatry for example). There are just way too many IM UWorld questions to do in 6-8 weeks. Especially if you’re on a busy service.
Also, pay attention on the hospital. Don’t Anki during rounds. Part of the reason my shelves went OK is I would think “Hey, I had a patient like this in the hospital and we did _____.”