The web site The First Line is accepting submissions for their fall issue. The way it works is that they provide the first line and you write the rest. Fiction submissions will be between 300 and 3,000 words and non-fiction between 300 and 600 words. If your entry is chosen, you receive $20 and publication in their magazine. Anyhow, check it out. It may be a worthwhile exercise. I am going to take a shot at a submission and see where it goes.