Ick. Word. And any Microsoft product, for that matter.
Unless it's Messenger, which is actually pretty cool.
I generally develop an idea of what I want to do in my mind, then just start typing. I edit as I go, then go back and read it through and edit some more. Each time I read something, I edit it. If somebody else is going to see it, I usually have my husband proofread it.
I tend to be a fast writer. In my freshman composition class, the professor went around the room once, asking people how long they'd spent on an essay. I think I'd spent about an hour on it, total. Everybody else said five, six, eight, even ten hours. I didn't want to hurt anybody's feelings, or seem like I was acting superior, so I lied and said it'd taken me three or so hours.