In response to Sliverbane's post, it may be a good idea for you, Edgehead, to start with a story that's uncopyrighted such as a Greek legend or something and make your own spin on it. Here's another tip but it was told to me in the context of art and not writing. Research can often inspire you so when you are feeling stuck, research, research, research. Most importantly with writing, you should be out reading other peoples stories as well as published literature.