Here's my problem: I've got too many things I want to do. I've set up about a dozen different scenarios that I think I'd make a good story (be it novel or graphic novel) to the point where my brain can't decide which one to focus on. I only have enough time in my schedule to work on one, but my going back and forth between story ideas, concept art, character development, etc. kind of leaves me in the same spot I started in.
Therefore, I'd like to ask some of the more seasoned veterans of storytelling out there, how do you focus on your particular stories?