Position yourself to succeed by doing the other things in your life that rejuvenate you. You can create little islands of time away from your novel that will help preserve your balance. Exhaustion will affect both your writing’s quality and your productivity.
My best time to write is right after coffee and breakfast - four eggs because, full disclosure: I'm really a komodo dragon - and that's because then I'm energized but not so awake that the critical voice clicks on, the voice that sometimes says, "Don't write that," or "Man, that sentence is terrible - you should give up and go pet the cats."
I've always wrestled with the difference between plot and structure, and after re-reading a lot of writing books I realized I wasn't alone.
Angela Carter's fiction blew me away and really instilled a passion for writing, bolstered by Vladimir Nabokov. But in general, I can't point to any one thing. I just always loved books and writing.
My parents read to me a lot as a kid, and I started writing very early, probably spurred on by Aesop's fables. Then they gave me The Lord of the Rings way too early for me to fully understand what I was reading, which was actually kind of cool. It was almost better - comprehension's overrated when you're reading.
One of the most important things as a writing instructor is to provide a lot of different entry points to subjects. To not impose your own personal experience as the One True Way.
I find myself in this bizarre position in which everything I write and talk about is pretty much about this issue, the environment. It feels a little too comfortable, because at the end of the day I can rationalize that I'm doing my share. I don't know if I actually am, I don't know if I should be more of an activist than I am. But at the end of the day, everybody needs to do those things that they're most likely to continue doing, and that aren't going to burn them out.
I have to have music as a soundtrack to writing fiction. I listen to it at other times, too, but it helps me write.
The best visual book I can think of is Lynda Barry's What It Is, but although I refer to it all the time it's not a creative writing book per se.
I believe the best creative writing lessons live in the specifics.
Trust your imagination. Don't be afraid to fail. Write. Revise. Revise. Revise.
The music I listen to while writing is really scene-specific. It's just a great motivator, a way to put myself in the mood.