It's not what you do, but how you spin it when it counts. You can do a very common activity, something simple, but then when you write your essay or talk about it during your interviews, tell a compelling story related to that activity, something that reveals your emotional depth or your humor or your unique way of seeing the world.
Lots and lots of premed students are EMT-basics by the time they apply to medschool. It's a common thing to do these days. So when it came time to write my essay, I wrote about a patient that was memorable to me and would be to the adcoms, a constipated guy who had tried to unimpact himself using a fork, and had lacerated his rectal vessels in doing so. I'll never forget my fellow EMT asking the patient, perfectly politely, "Sir, if you were going to attempt to unimpact yourself at home, why not use a spoon?"
It was a funny, slightly gross story but I know it made me stand out and ultimately the strategy worked.