I think this was why I am still writing the first novel that I finished last year. I wrote the story and some how it didn't work, I didn't know the characters and the town was this angry backdrop that didn't make sense. It took me abandoning it to find the real story.
Are you putting yourself in the pattern to produce enough crap? It is the only way that you will find something special.
Confession time: I know I have not been in the zone lately. A writer who isn't writing..well is a reader. I commit to get 5,000 words this week. (And that does not count my blogs.)