I mostly start up with a thesis statement, about the subject i'll be working on. I try to narrow down towards my thesis in the first paragraph. It generally starts from everything (nothing) and ends up in the specific argument; my thesis.
Once I have a rough idea of what I'll be talking about on my post, I make an outline, I categorise my arguments, in the order they will come up as I get into more detail on the subject. Which is quite efficient since then I'll also be showing my train of thought that has led me to choose such a thesis, hence bringing the reader one step closer to agreeing with the thesis itself.
As soon as I start feeling confident in my opinion, and the outline is done, including all the main points in the proper order. I start posting, adding as much spice as I can, with all fancy and formal words, so i don't just know what the f word I'm talking about but it looks like I am. Which will eventually pique more people's interest on the matter at hand, giving them a pleasant reading, followed by a headache and some nerdrage on occasion.
Ultimately, no, I don't always post what I type, I type what I post, in a professional manner off course. I give special care to each and every post of mine, as you can notice from my post count.
Damn, i should've been a journalist. No?