You willl probably have to walk away from it for a while. If some thing else is bugging you, try to either fix it or get it off your thoughts. Depending on how you work in your noodle, different points will assist. I heard walking around, exercising, getting out doors, think about some thing else and come back later to it, read a book and get other ideas, read a sentence or two to a friend and have them create the next 1 (kind of like rolling a car down hill to begin it lol), eating a meal/snack, talking to someone, sleep (hopefully dream up some thing), listen to some music, play some video games, getting into the mood/tone/atmosphere at the part you are stuck at (BE that part), or be that character. Also also. Look into role playing (not sex role playing but its like you set up a setting and you and other people write the story. Like you create some then another person create some. Some internet games like Runescape and neopets have role playing in there 'Forms') hoped it helped. Good luck if your trying to publish.