Yesterday I put over a hundred envelopes in my mailbox for the mail carrier to deliver.
As I was flipping up that red flag, I thought, hmmm, I'm not sure my mail carrier is going to be as happy about all these letters as I am. So I real quick jotted her a note -- "thank you" with a smiley.
Later, when I noticed the red flag had been flipped back down, I checked my box to find a reply from my mail carrier:
Love that attitude! Totally makes me smile.