Writing Advice, Via Metafilter

I'm becoming a fan of Ask Metafilter, a tangent of the regular Metafilter in which people ask questions — it moves so fast it's hard to really follow, a flood of need and satisfaction, all user-created. A couple days ago, the question was, boiled down from several paragraphs: how do you write as a professional writer, overcoming the need to be inspired, the draining effort needed to combine words into sentences, or the nagging fact that your work sucks? The responses aren't much different from the usual "Get Your Novel Written!" advice books, but so much seems to have been culled from personal experience, it's like being taught how to be a writer by Frankenstein's monster compiled from the useful parts of dozens of amateur writers.