Just something I use to help cure writers block it might help somebody reading this thread.
When I have an idea that I can't seem to develop I start with the characters. I write down everything I know about them. Hair color, length, piercings, tattoos, the stories behind the tattoos and piercings, how tall they are, what their parents are like, what their friends are like, what they would and would not do for these people, so forth and so on down to their likes and dislikes. Write about their beliefs, how strong they feel about them, how far they'll take them. Usually while expanding my characters I discover that there are some things my character just will not abide by, once I figure this out I start creating a character that will abide by these things and I have a protagonist and an antagonist. From there I try to think up scenarios that would get these two characters together more times than not this leads to a plot line and a story. Hope this helps somebody. D.