For our little group we get togather in the evening with a pad of paper, and plenty of drinks. I find you come up with some very interesting story lines and scripts by this method. Granted I won't write an entire film by this method, however, for some of the more major sites or scenes it's quite helpful, allowing you to fill in the gaps between scenes while sober.
How do you start writting a story? How do the ideas come to you? Lets hear it!