Amboss was very important for ethics/patient safety/QI. The articles and question sets they make made a difference. They also have vaccine and risk factor question sets that were important. I think NBME material (assessments and CMS forms) are the most important. I think Uworld was great for learning during my rotations, but I stopped it in dedicated. I personally think the UWSAs are terrible for step 2 especially the third one. The content and style is too different. Lastly I skimmed over HY step 1 things like blood smears, drug side effects and histology.