Or, rather, to report when you're counting words or not to report when you're counting words. Justine has a post on the subject.
Last year when I was deep into the slogfest that was writing The Durand Cousins, I started posting my daily word count here. I stopped because my computer guy told me reading that stuff was making his eyes glaze over and that that couldn't be good for him.
I liked the idea of posting word count because keeping track of your word count is sort of like taking part in a race or, perhaps, hiking The Appalachian Trail. We're talking a race to the finish line here. People like watching races, don't they? Why wouldn't they like to watch as an author approaches the end of the trail?
Oh. Because it's boring.
Notice that I'm now calling Justine "Justine" even though I've never met her, and she has no idea who I am? It's offical. I am now cyberstalking her blog as I used to cyberstalk Jane Yolen's.