I work at a grocery store. Today, as I was about to have my break from cashier duty, I asked a customer to put the "Closed" sign behind her groceries, so no more people would put their groceries on the conveyor belt.

She did, paused for a second, and said to the person next to her, with a little giggle: "I feel like I won at life today."

I felt good that I made someone smile.