As a freelancer who makes her own hours, I’ve learned a few things about personal momentum. I’m a morning person, and my peak productive time is before 10:00 AM. If I start my day by sitting at the desk at, say, 5:00 AM, and digging in on actual work, I’ll keep going all day. If I start the day by, say, cleaning the kitchen or folding laundry or phaffing about on the interwebs, I’m in trouble. And if, God forbid, I sit on the couch and flip on The Today Show, all bets are off; I’m not moving until bedtime. I think of it as Newton’s Law of Personal Momentum, for I am an object that will either stay at rest or stay in motion, based on where I am at 5:30 AM.