When a story gets in my head, I can't ignore it. Either something big and time consuming, to a random moment that was out of the blue. Few stories only give me parts of it and will only give me more of it as I write the parts I remember down somewhere. Almost all of them, I have no control over. Most people start off with an idea and build from there, doesn't work well with me. To me, it's like a dream but I don't want to control it. Instead, I let the dream mold itself as I watch.