Great advice.  I loved this particular bit (which is not advice, but still fun):

The last novel I wrote (it was ANANSI BOYS, in case you were wondering) when I got three-quarters of the way through I called my agent. I told her how stupid I felt writing something no-one would ever want to read, how thin the characters were, how pointless the plot. I strongly suggested that I was ready to abandon this book and write something else instead, or perhaps I could abandon the book and take up a new life as a landscape gardener, bank-robber, short-order cook or marine biologist. And instead of sympathising or agreeing with me, or blasting me forward with a wave of enthusiasm—or even arguing with me—she simply said, suspiciously cheerfully, “Oh, you’re at that part of the book, are you?”

I was shocked. “You mean I’ve done this before?”

“You don’t remember?”

“Not really.”

“Oh yes,” she said. “You do this every time you write a novel. But so do all my other clients.”

I didn’t even get to feel unique in my despair.

Keep on writing.  “That’s the only way that novels get written and, short of elves coming in the night and turning your jumbled notes into Chapter Nine, it’s the only way to do it.”