I ran a talent show to purchase supplies for an orphanage while I was in high school.
I served 10 months in AmeriCorps NCCC (one of the most phenomenal experiences of my life).
I ran a small nonprofit organization for a few years.
I've been a foster parent.
I currently volunteer for an organization that assists victims of domestic violence and sexual assault.
I've participated in the McNair program at my university, which included a research internship, presentation that aired on local television, and a publication.
A few conference presentations, guest speaking opportunities (such as a scholarship essay writing class)...
Also, my mother has Bipolar I, which taught me crisis management skills at a very early age. I know they say grad school committees don't want to hear sob stories and the general "I want to help people" line, but when you think about it, we all have personal experiences that laid foundation for pursuing a career in this field.