The world's full of stories....All you need may be a character or two, or a conversation, or a situation, or a place, and you'll find the story there. You think about it, you work it out at least partly before you start writing, so that you know in a general way where you're going, but the rest works itself out in the telling.
Ursula LeGuin, Steering the Craft: Exercises and Discussions on Story Writing for the Lone Navigator or the Mutinous Crew, p.118