When you tell people that you work from home, the first reaction is usually one of jealousy. It must be so great, people say, to be able to sit on the couch in your pajamas all day. And it is great. But it's also terrible, sometimes, when you're battling a million distractions or feeling wonky because you haven't seen another human being all day. If you find yourself, by choice or by chance, working from home, here are some of my best tips for staying productive — and keeping your sanity.