I was in line at the gas station mini-mart today. Two people ahead of me.

First in line, a woman, buys gas and cigarettes. Clerk says, "Have a nice day, ma'am." Woman never looks up at him. Hurries out.

Second in line, an older guy, buys an energy drink. Clerk hands him his change and says, "Have a nice day, sir." Guy takes his change and never says a word.

My turn. Clerk rings up my candy bar. Before he can say anything I say, "You have a great day, man."

He beamed. A big old smile. "Hey, you, too. Have a good one!"

Nice matters. If not to you, then to someone else.