I try to do small things to make other people smile at random times...you never know what is going on in their lives and it might make a world of difference to them.
We ride a Goldwing and travel many back roads. I try to wave if I see someone outside...some wave back and others don't. I like to think at least they know "someone" saw and thought about them today even if no one else does.
Glad the clerk had a good heart :) Character is hard to find somedays.