And that means more than just running spell-check. Check the piece once, rewrite, and check again. Then when its done, print it and read it aloud. If it doesn't roll trippingly off your tongue, it won't off an editors. Imagination We all have one.
Every brain comes equipped.
But a writer needs to develop their imagination, harnessing it to overlay the fantastic on top of the mundane. That's what writing is, the ability to conceive of situations that would not normally occur without our fevered minds to help them along. Read books and stories and novels and anything else you can get a hold of. Don't simply read the genre you want to be published in. Your mind is a tool.