So growing up, my mom always had a few sayings that drove me nuts, but as I've gotten older I've heard myself saying them and I know that I'll probably end up saying them to my kids. With my mom, her classic saying that drove me nuts when I was little was, "Don't pee before your water comes" (which, I took to mean, don't worry until there's something to worry about). I used to hate when she'd say that, but I say it all the time now.
Are there any Momisms (or Dadisms) that you hated to hear as a kid but you hear yourself saying now (or can see yourself saying to your kids)?