Well, if you can't think of a subject to write about, create a world, setting or environment, and explore it. That's what I often do. My stories usually have a formula of: creation, description, exploration, and execution. Create something, unfold it, and explore what you've made with characters and their environment. I try to make things like an adventure.
Heh, I also overthink and overanalyze, but that curiosity really helps me create vast storylines and multiple characters. My stories will sometimes literally have up to a few dozen named characters, sometimes separated into groups. When making a story, think of it like an adventurous role-play, of which you are the constant thread master controlling everything. Sometimes, you don't need inspiration, just curiosity.
10-Sep-2015 00:05:21