Get a Dietician and physical trainer. Use this opportunity to get yourself into healthy shape and never look back. I did something years ago and had no clue just how bad I was actually feeling before the improvement. Both physically and mentally. We are not designed to sit at desks all day.
Do your feet crack sometimes? Consider testing for athletes foot.
Blood, STD and Cancer screenings, as many as they’ll give you. Hell, depending how old you are, maybe a colonoscopy.
Sleep study. MRI, ECG, EKG. Allergy test. Dermatology/mole screening.
IQ test, find out your best skills and then learn how to use them to your advantage.
DNA testing, if you really want to know some things you may be perceptive to…though personally i don’t know if I would want to know if Huntingtons is in my future.