I too sit and stare into space and soon I’m in my story with all my characters. I become them one by one. In my mind, I begin to speak as they would, act and respond as they would. Soon the scene unfolds and I know where to begin.
Sitting and going into my story is not a waste of time, it is the beginning. I transfer what is in my head to paper, or my computer. I Organize it later. I allow my story to unfold, wrinkles and all.