Depends on the mood I am in. Often enough, I go for it in the edit box and then review it several times before publishing it.
However, when I write a poem, for instance, I am far more critical of meter and other devices lyrically; writing prose is for me, basically a model of my own mannerisms in speech so I "freestyle."
The old adage that "there is a difference between the spoken word and the written word" is both true and false. People don't sit around at Starbucks and speak in Iambic Pentameter the way "Bill SHAKES" made his era look. They didn't speak that way then, though, it certain that they spoke differently, as it is more than evident that they wrote differently. These days, such authors are acclaimed as Literary Fiction Writers due to the aesthetics of their prose. I happen to favor such literature, as today, we are bombarded with people who sound over-caffinated, like, this, like, like, like Facebook and stuff like that.
Preparedness is tough when you write either creatively, or philosophically. Intuition moves one through the syntax of their sentences there, I believe, and could result in staleness if their creative or philosophical acumen isn't impromptu.
Now, if I were writing less like the aforementioned, and instead, far more like one writing non-fic, then I would have my ducks in a row, references in place and an outline for whatsoever my modus operandi is regarding my writing. Otherwise, I stay fairly loose, and even toy with language quite heavily because I love conceptual writing: my T(r)endency.
It's a good question to ask one's self, though. I have deleted hubs that were very choppy in so far as content was concerned, and at other times, intentional discursiveness was imbedded much like Nietzsche, Barthes, Kant and even Edgar Allen Poe. These are several of my influences, so its not uncommon that my preparedness might come from seeing something in their work that I want to either appropriate as an author to, or expand on what they've contributed by; or disagree with them if current thinking allows for it in the grand scheme of things literary.
Most of all, I prepare by relaxation, camping, hiking, drawing, sculpting, reading and a host of other things where thought and feeling grant me access to my next Hub. Beyond that, I never sit to map out my diatribes, though I do, as I said, rinse and re-rinse my poetry because it is awkward enough to expose such subjective thought and feeling as though "prepared for nudity."