The Qbanks
The overarching key to the dedicated period is to do as many practice questions as possible. Highly recommend completing your questions in TUTOR MODE, as you can see immediately why you got a question right or wrong and thus analyze your train of thought. Use your Qbank to build your knowledge, not necessarily to test your knowledge. Test and time yourself using the NBMEs instead.
At this point, you've probably done a good amount of your Qbank of choice from the shelves, so now you're left with a few choices:
1) Reset your Qbank - this is a good option to just start fresh and review everything, or at least the topics you need more practice in. Just time consuming.
2) Redo only your incorrects - also a good option and more efficient. However, potentially miss out on concepts that you guessed correctly on.
3) Switch to another Qbank - more questions you haven't seen yet! Just more monies, of course, but you're probs numb to that now.