If you were fortunate enough to attend college, think about what you were involved in while there. You could have been an athlete, but the sports team was likely already there when you got your uniform. You could have been a thespian, but the theater group was already performing plays when you arrived. You could have played in the college band, but it was already making music when you got there. I could continue but for the vast majority of my readers, you were likely participating in a group that existed perhaps long before your enrollment. Consider though something you may have organized or created during your college years.