I've learned a little secret to getting my teens to get things done - it's called "having a person of interest."
In the old days, when I needed some leverage, I used to threaten to take away the Playstation, ground them from TV or try to impose some other form of tortuous discomfort. It never seemed to have quite the desired effect.
But once they "like" someone, you know, THAT way. . .threaten to keep them from going to the big party this weekend, or tell them they can't talk to "them" on the phone and watch how quickly the room gets cleaned or the schoolwork is finished!!
It's amazing! If I'd have known this was the answer, I'd have let them start dating when they were six!!