I guess my question is... how do you STOP???

This morning I woke up to find that my mother had scrawled "Stop picking your face!" on a towel in my bathroom and "Be KIND to your face! It's a beautiful face if you just let it OUT!" in BRIGHT RED SHARPIE on my bathroom mirror. >.<

She's absolutely a tyrant about it, but her guilt trips and constant nagging don't help at all. What do I dooooooooo????