Talking to her. And listening.
Ask what she likes. Use each of those things as a basis, and keep exploring. Think about your exams so far - what has she seemed to enjoy the most? What has she not liked as much? Find the things she likes and expand on them - if she's interested in having her heart listened to, learn about cardiology and expand that part of the exam. If she's interested in temperatures, get a few more thermometers, try different positions, etc. If she likes enemas, try new recipes, nozzles, etc. If she likes gyno play, etc....keep learning. And always keep watching - her interests will evolve and change. Be ready to adapt, to meet her needs - that's the fun part of this cat-and-mouse game - you will never catch the mouse, but you will have a damn good time chasing it
Tell her about Zity - see if she's interested in exploring ideas herself.
Each of us are different. My interests and fetishes will in no measurable way map to hers. Anyone who tells you any different is at best wrong. Communication, of all kinds - verbal and other, is the key to any and every relationship - SHE decides what she is interested in, just as you control your interests. Enjoy the thrills, keep and open mind, and have fun