Since this topic is late--week's half over!--I'll keep it simple.
Write a sentence. Make it a good one--maybe the whole thing will be a story in and of itself. Maybe it'll be a compelling fragment belonging to a larger conversation/piece. It could be a thoughtful revelation, a meditation on your current state of being, something vulgar, something insipid, anything you want.
This one's so easy that you'll probably need to get tested when you're done with it.