Certainly not embryology. I thought I was going to tap into all these great resources I had accumulated during my first two years, but I don't think I used any of them. I ended up pulling out Moore's anatomy when I was a 4th yr anatomy TA, but otherwise, I don't think you'll need any of them.
I'd keep an anatomy atlas, maybe a path book, pharmacology if you're thinking anesthesiology and if you are thinking cardiology/critical care, maybe a cardiac phys.