Concentrate Your Effort
Don't write too much. Concentrate your sweat on one story, rather than dissipate it over a dozen.
Somehow, I missed the (paraphrased, shorter) duplicate of this one:
Be Diligent; Inspiration is PassingDiligent
Don't loaf and invite inspiration; light out after it with a club, and if you don't get it you will nonetheless get something that looks remarkably like it."
Part of one quote; I split them to narrow down the topic.