I don't know about other peoples writing process but I always just sit down and vomit all over the page to begin with. Then I go back and edit down what i've written, removing or rewriting a majority of it.

I can never just sit down and write a piece our perfectly from the beginning. I think editting is more important than writing the first draft, as the first draft is almost always rubbish. It'll have a few gems in there but it's mainly to help explore ideas which will help produce good writing later