I invented the letter "B." As you can imagine, we're all better off with this letter, things were pretty damn lacking without it.
Um, seriously... when i applied, started a club, vp of that club, ta'ing, tutoring, 1.5 yrs research, coupla awards, standard ER volunteering and some shadowing, played club tennis, competetive running. nothing too mind blowing but it was good enough for med schools.