I would look at biochemical pathways, PCR, kidney physiology, a genetic disorder (such as diabetes), fluids (from physics), carbonyl name reactions, electrochemical cells, acid-by-base titration curves (particularly of an amino acid-focusing on pIs and charge at a given pH), and classic social psychology experiments. That should keep you busy for a few days.
I'd start with a blank page for each subject and write down everything I knew, and then I'd review my previous notes and consult my books to add in extra information and especially test-taking tricks. I'm not sure if you have BR books, but a perfect example is the shortcut approach for dealing with buoyancy questions. That is huge and will save you at least 30 seconds per buoyancy question, should you get a few. It's a great last minute review. If you happened to use BR, then I would make a master list (from memory) of all the shortcut math tricks from physics and general chemistry.