I can’t explain it, and it might sound a bit cliché, but I make more breakthroughs in my writing while in the shower than anyplace else.
Today’s shower yielded an entire restructuring of my current manuscript, a means by which the story will reveal itself in a more logical, ordered way. I’ve discovered plot twists, new characters and the ending to at least one story while in the shower. Perhaps it’s because the shower is the only place where I truly unplug from my podcasts, my audio book, conversation with my wife and the other distractions of life.
Fortunately, I take at least two showers a day, so I always manage to get at least a little accomplished by way of productive thought. Otherwise, I might be lost.