Two days before the interview, focus on execution rather than learning a lot of new material. Do a small number of full cases from the case library, review the mistakes you keep repeating, and make sure your math, structuring, synthesis, and final recommendation are stable.
Also prepare your fit or behavioral stories. You should be able to explain why consulting, why the firm, and your strongest leadership or impact examples without sounding memorized.
On the final day, keep the workload lighter. One good case and a short review of your stories is usually more useful than cramming for hours. Protect your sleep because clear thinking and communication matter more than squeezing in a few extra drills.