For me, the best thing about writing is creating new and exciting characters. Because of this, I tend to let them drive the story forward, and sometimes they really surprise me and take me down divergent paths I hadn’t expected. These are some of the best and most fluid times to be writing, in my opinion.
I also believe every character has their own unique and interesting story, even if that story isn’t in the pages of your current book.
So the writing prompt for today, is to take one of your side characters and write their story. It could be a member of your supporting cast or someone that had only one bit of dialogue and then was gone from the book forever. Their story can be a simple quick flash fiction or a novel. It might start as one and end up as the other, who knows?
Make it interesting, make it fun, make it scary. Whatever you want it to be it is up to you… just make it.