I've been advised by those who've been there that things start to improve significantly once children turn, um, 25 or so. A friend uses the term "nagony" to cover both the agony of listening to your children nag you, and the agony of having to nag them over and over and over and over.

I treat myself every now and then to the delicious classic -"Because I Said So!!!" I savour the words as they roll off my tongue, regardless of whether or not they're effective. I love the fantasy world that they conjure up.