Bad writing is more than a matter of shit syntax and faulty observation; bad writing usually arises from a stubborn refusal to tell stories about what people actually do― to face the fact, let us say, that murderers sometimes help old ladies cross the street.
Write at a pace that doesn't surpass your creative flow. Don't be hasty; don't be sloppy. Don't forfeit impressive writing for an impressive word count. Because eventually it will all have to be edited, and you'll find that it is harder to make bad writing good than to make good writing better.
The sky grows dark over the city as Janey tells me her story. Teh beast was supposed to help their community. Something that would look good in a brochure, I suppose. But instead, it cut loose, took out in to the Williamsburg night. Janey and the kids went after it , and when they finally caught up what does it do? The thing ate a hipster.