I remember I used to swear to myself that I'd never, ever say "Have a good one!" to anyone as they left the store. But I just caught myself doing it.
Also, I used to think I could get away with never calling anything "cute." For a while I was really inventive and employed all kinds of stupid-sounding synonyms, and went around shouting,
"Fetching!" and "Charming" and even
But that kind of thing is all over now.