I tell them all the time dar.
I think the fact that they get positive feedback from us at home all the time is what helps them be such good students and people in general.
If/when I lose my temper and say something negative, I can always see very clearly what a terrible impact it has on them immediately. I'm not one of those pop psychology mothers though. I believe very much in corporal punishment in some circumstances, but I find it's very rarely needed if kids know you mean it when you say it's coming.
Anyway, watch out for the book. lol I'm sure most people would find my parenting style to be quite controversial so maybe it'd be a best seller.