Last night I went to bed with the full intention of revising my novel. And then I woke up this morning and had a crushing feeling of 'Why Bother?'

All of a sudden I can't shake the feeling that the best I'd be doing with my time is - pardon my term - polishing a turd: it's boring, basic, I feel I'm always telling (even when I'm not), the characters are flat, the dialogue weak... I could go on and on.

Now, I know they say that every writer suffers from their inner-critic, but I've never had these kinda thoughts before; sure, I think my writing is 'meh' most times, and am pleasantly surprised when people like it. But never anything like this...

What's worse, I still have those agents waiting to get a hold of it. I'm at the end of my rope, and need advice. What does everyone else do when they feel like this?