I stop writing that story and work on one of the other two. The idea will come. Or I'll skip ahead to the next chapter, write it, then go back and make the bridge. Or I'll call Nolan, or my best writing friend, Jacquie Rogers (who has a wonderful sense of humor) and toss ideas around. A second or third imput is great, so get someone to brainstorm with, who doesn't mind if you don't use their suggestions.