"If you get an idea, write it down.
Until you have actually written it (handwritten or on screen, whichever),
you haven't captured it.

And you have to capture it:
that's what releases your brain to go on to the next stage."

"That, in a nutshell, is why most of the people who want to write a novel, don't write a novel. They think that dreaming around with characters and stories and scenes will produce a novel.

It won't. It doesn't.

What produces a novel is: work.

You write stuff down. You start thinking of the next thing. You write that down. You move on.."