March is indeed National Novel Editing Month. And December is Unofficial National Novel Finishing Month.
I like the idea of outlining the next day's work. That would really help me when I have an idea of what I want to write next, but the words haven't come to me.
I've got an idea for this year. In my head it's a complicated children/young adult fantasy novel, so I should probably start outlining now. And doing some research for it before November.
Another thing is that dialogue is great for increasing your word count and is way more interesting than long bits of exposition. Instead of saying "Michelle was wearing an ugly orange shirt", have two characters discuss Michelle's shirt. It's also more in line with the way people really talk and behave.
The NaNoWriMo forums are a great way to get advice and support. They're still active now, as people prepare for November.