I have a deadline, and I need to finish my line-edit so I can email my revisions off to my agent. And yet. I have clearly gone insane, because I find myself at this very late date rewriting scenes. I don't have time for this. As I say, I've gone insane.
And yet. There was one scene in my book that I've never liked. It was necessary to move the plot forward, and the scene after it (which scene I do like) makes no sense without this disliked scene before it, so I felt rather stuck with it and wishing I could find something else to put in its place. This morning, I had A Truly Great Idea for this scene, an idea that's had me excited all day and when I got home I spent hours revising the scene when I should have been finishing up my line edits.
The new version of the scene is radically different in an important way, and much cooler and weirder and surprising and I do love it. But now I have to get back to my line edits.
Update at 11:34 PM: Line edits done! Sleep now!