Stephen King tells us how.
This reminds me of William Strunk Jr.'s Rule #17: Omit Needless Words.
Really, the nut of the essay is this:
A. Be able to write decently.
B. Know your market.
C. Prune, prune, prune.
I am also reminded of Charles Bukowski: "Sometimes you just have to pee in the sink." No, wait, that's not it.... oh yes, it was this: "Genius might be the ability to say a profound thing in a simple way."
Or what he said in this interview: "People just don’t know how to write down a simple easy line."
That interview referenced above is great, by the way.