It is vital that you demonstrate your spike with truly distinctive and colorful examples of your impact: Compete and excel in major competitions. Submit your work to well-known publications. Look for ways to quantitatively measure your impact (e.g., “Applied innovative strategies which increased membership of the dance team by 200%”) Think big and think deep.
Your non-profit and volunteer work will pack a bigger punch if you can weave them into your personal story/spike. For instance, someone with a passion for humanitarianism could organize a group from their church to send care packages or run homeless shelters in disaster-stricken areas. Someone with a science spike could create a non-profit that runs science fairs at elementary schools around the state. Someone with a music spike could arrange a monthly ensemble that teaches music to people in assisted living communities. Get creative! These activities can show greater depth than if you did something more run-of-the-mill like volunteering at a soup kitchen.