It's Day 19 of our Act of Kindness Advent Calendar - 25 Days of Spreading Kindness. Today, let's make someone's day a little brighter. Leave a generous tip for a service worker or delivery person. Or plan a group breakfast or lunch where the entire group commits to tipping a larger-than-usual amount. Your kindness can bring unexpected joy to their day, and you never know just how big of a financial impact you might make.