Most writers know about free writing. It can literally "free" the random word associations inside your linear brain. Some use it as a warm-up before launching a writing session. Free writing allows whatever is blocking the creative pipeline to free up--or so I've found.
In the same way, exploration of sound can also free the creative flow. For me, sound is an important player in creation of theme, voice, and pacing, especially during revision.
I learned from one of my teachers way back in grad school to create a soundtrack for my book. Which became a playlist. To me, the soundtrack is one of the best parts of a great movie. Of course I love good acting, excellent setting details, and brilliant cinematography. But when the soundtrack is stellar, it can really intensify the meaning and emotion of each scene.
