After finishing his latest fiction I’m rereading Stephen King’s On Writing which, although not precisely instructional, is the most inspiring book I’ve read when it comes to staying the course as a writer.
Last night this reminded me why:

“. . . in my heart I stayed ashamed. I kept hearing Miss Hisler asking why I wanted to waste my talent, why I wanted to waste my time, why I wanted to write junk.”—from Stephen King’s On Writing p50