Write freely and as rapidly as possible and throw the whole thing on paper. Never correct or rewrite until the whole thing is down. Rewrite in process is usually found to be an excuse for not going on. It also interferes with flow and rhythm which can only come from a kind of unconscious association with the material.So here I go, writing with the view to produce a Very Bad First Draft, just so that the First Draft bloody well gets written. Watch me bash out tired old metaphors and smoosh together cliches and BEHOLD ALL MY ADJECTIVES! Moreover, see how my characters are so boring and their dialogue so stilted? That is just for now.
And of course, when writing, it is important to just keep writing and not spend most of the afternoon reading writing advice.