Eight minutes to midnight. I'm going to bed any second now, I swear.
The goal of NaNo is to write 50,000 words. Of course you're going to go back once you're done and edit, etc. before the thing gets released to the world.
One of my problems is that I'm used to somewhat terse writing when left to my own devices. I'm not one of those authors that can spend three paragraphs lovingly describing the brocade on a freaking pillow. It's too much. But I think I sometimes err on the side of being not quite descriptive enough. I want to give the reader enough of a foundation to see the big strokes of the room or whatever but leave them space to fill in the details themselves where I don't need to do it.
So a bonus to NaNo and it being a word goal?
DESCRIPTIONS! It basically forces me to take more time than I would naturally to describe things. I'm still not going overboard. See above example in re: brocade and the number of paragraphs devoted to it. But I'm being more descriptive than I normally would be.