For instance, King advises the writer to use a conversational voice, which would seem more akin to stylistic preference rather than the work of true art. There is much great fiction, offerings from Thomas Mann, William James, Iris Murdoch and others that succeeds without sounding like a grandfather sitting down to share a few stories around the campfire. This stylistic preference isn't evident in some of King's raw, powerful earlier work, either. The best piece of advice King offers, other than to read a lot, is to write a lot, to sit down and actually do it. I agree that plotting things out causes a brain-freeze, and that the writer should discipline him or herself to writing in a serious block of time everyday, cut off from the rest of the world.
Writing is work.
It isn't always fun. Sometimes the best stuff comes excruciatingly, and the worst when one feels uplifted by blind creative outbursts of verbiage. King's emphasis on this point is well-executed, and well done. On Writing is worth its price for these moments of revelation themselves.