I know a lot of people hate plot bunnies, but most of my novels start out that way. Medusa's Desire, a few years ago, was nothing more than a jotted down sentence along the lines of: "Write a novel where Medusa is the hero instead of the villain. It should be a romance and maybe she's in love with Perseus." I daydreamed about it a little and really wanted to write it, but it wasn't developed enough at the time. It evolved as I studied the myth and let the idea build up, while I was finishing my previous novel.
I always deal with plot bunnies by jotting down my ideas in a word document to be looked at later. I'm usually working on something else when they come, so I don't have time to pay attention to them. I'm glad I do because I have a horrible memory. A few months ago, I remember looking through my plot bunnies and not remembering even half the stuff I had come up with.
I was a bit sad lately because although I have many outlines already saved on my computer, it seemed like all the plot bunnies had run away. It had been awhile since I had come up with something new, except this past week, things have been different. I've been waking up in the middle of the night or taking a nap and waking up and suddenly there are plot bunnies in my head that I need to immediately jot down before I forget them. It's very exciting.
What do you do with your plot bunnies?