I am one that felt opposite of many, I felt that I could have gotten a leg up if I had started studying sooner and have no idea why people say do nothing. This could be b/c they are different than I am, or their lives run differently. I find that the people without families have a much harder transition as they are used to free time to themselves,and those with families don't miss the free time they never had, but seriously miss time with the kids, etc. I got the baby Miller as it is called and started reading. Same with anesthesia secrets, the beginning stuff is often stuff that isn't gone over in depth in school anyway. I also watched a ton of Dr. Najeebs lectures, some are free on youtube, the rest at cost (it was 99 bucks for 2 years of access). It is in depth physiology and I thought that it was great. You could also look at coursera and sign up for a free science class, to review something like chem or phys. There are also tons of free stuff on Khan academy. there are also tons of notecards made up on cram.com or quiz let.com. You could always just start memorizing something specific, rewrite over and over from memory something like all the structures and nerve supply to the airway. Something that you will have to know like the back of your hand. In school there will never be enough time to adequately study how you would like to, not enough hours in the day, so you can focus on something, or just review for fun. I also like emcrit podcasts, and the core anesthesia question of the day. There are many anesthesia websites out there to learn things like formulas, flow volume loops, etc. If you haven't read Watchful Care, it is a history of CRNAs in this country. It can be as in depth or light as you make it! Good luck!