Beyond the four you've listed, almost everyone lists a hobby, performing art, or athletic activity (doesn't have to be intramural or club sport). If you don't already have something you enjoy for fun, develop a hobby to help you decompress - you'll need it.
It is not uncommon to see paid employment (non-clinical), teaching/tutoring (TA for a course when you are a upper level student), presentation and/or publication listed separate from research, honors/awards (make sense if it is awarded to one nationally, or even just one person at your school), leadership (directing your peers toward a common goal).
You need not have all of these but those are some of the categories that your work and experience might cover beyond the big four.