I have a few,
"if a job is worth doing, it's worth doing well!" that one was in response to finding my kids had put the dirty dishes in the cupboards instead of washing them.
"there are consequences to our actions, and at some time we all have to face those consequences." This one preceded me doling out punishments/grounding when the kids got caught! lol
and my all time favorite when I thought I'd seen/heard everything...
"Well butter my butt and call me a biscuit!"
:)