My mind goes through increasingly erratic intervals of thoughts when I lay down to sleep and I've learned that I can't have silence or else it becomes deafening. Music doesn't work for me because I become to engaged and don't want to sleep, same with movies(unless it's a movie I've seen numerous times). What works for me is a single persons voice talking a lot. Standup comedy works some but what works the best is listening to a mega nerd.
One example I can give is Sean Caroll on youtube. His "biggest ideas in the universe" series. I like this series inparticlar because he also uses