Today is International Pay It Forward Day, a time to perform and celebrate acts of kindness that can make someone else's day a bit brighter.
In 2000, author Catherine Ryan Hyde inspired the "Pay It Forward" movement with her bestselling novel of the same name, about a boy who accepts his teacher's challenge to come up with a plan to change the world.
You may have seen someone "paying it forward" before: covering a stranger's bill if they're short on cash or leaving a special pick-me-up treat for a coworker. Here's a list of 8 ways you can participate and make a difference in someone's life.
WATCH: Trailer for the movie, "Pay It Forward" (2000)