My absolute weakest moment for this is actually right after I finish something and am deciding what to work on next. I'll start on about five different projects that I've had floating around in the back of my mind, and then they fight to the death until only one is left. It's like...literary Darwinism.

I think that every story hits patches where writing it just plain sucks and it's so tempting to drop it and move on to something else. That's one of the challenges of novel writing.