Be prepared to ruin her life at least once a day. Today, I ruined it twice. First, she did not get to skip school to go to work with Dad on "Take Your Child to Work" day. Hello? Daddy's office hours don't start until 2pm today, Sweetie. And then, I made her the oldest living 14 yo to get braces! Yes, yes! I have such a feeling of accomplishment, today.
Accept the fact that you're (pick your favorite adjective) the stupidest, meanest, weirdest, laziest, pickiest mother on the face of the earth! If she forgets to give you a permission slip to sign or if you don't have purple raffia paper for a project that's due tomorrow, it will be ALL YOUR FAULT that she flunks!
See these rolling eyes:

, I see them on a regular basis. Seems that everything that I say elicits this response.
Like Bonnie said, turn and run away...fast!!! And if you have more soon-to-be-teenagers at home, then STAY AWAY!