I may be alone in my thinking but for me writing comes to me. It decides when it is ready, it pounces rather unexpectedly and before I know it, it is upon me. My job is merely to transform the ideas onto paper. Or to describe the world that already exists.
My writing tip is: let ideas and creativity come to you and allow them to inhabit you. Don't reject or oppose ideas and story lines. Instead, welcome them. You'll be amazed at the result.