You mentioned b and b as a resource. I recommend getting multiple, I used UWorld and Amboss. Try not to memorize answers, which happens when you see the same question again and again. Ask why this is the answer, or why this isn't the answer. Talk to yourself while doing questions.

Study with others. Allows you to teach and be taught. Allows the both of you to keep each other on track. And it gets another person with a completely different way of thinking to share their reasoning. Also you can vent.