I credit Dame Agatha Christie for inspiring one of my more obsessive writerly habits: the drawing of floor plans.
I think I own every book Agatha Christie wrote, and I loved when she put in the floor plans of houses to show us what rooms were where, and how impossible it was for anyone to have committed the murder in question.
My own stories didn’t really call for such elaborate measures, but the more I wrote the more I saw the advantage of using a floor plan as a writing tool. As clearly as I saw some scenes and settings in my mind, I could get turned around sometimes, so I got into the habit of sketching out rough plans of houses my characters lived in. Just a few lines on a page, really, so I didn’t have someone walking into a cupboard when they were supposed to be in the kitchen.