As far as music goes, I have a writing playlist of instrumental music - movie scores and classical stuff - that I used to listen to a lot and now just listen to once in awhile. It depends on the story I'm writing. Sometimes music helps me get in the mood for the really dramatic or romantic stuff, but lately, it just feels cheesy to me. I really built up my writing playlist when I was writing Broken and BMS, which are both pretty over-the-top and cheesy... and now I usually write in silence, and my stories are generally less cheesy. So I think there's a connection there for me. Also, I found I was ruining certain movies by listening to their scores over and over again when writing certain stories, and now I can't watch certain scenes in said movies without thinking about certain scenes in said stories, which is weird.
I sometimes do make playlists or folders of songs that fit certain stories, but I use them more for inspiration BEFORE writing than while writing, just to get me in the mood. I can't listen to any song with lyrics when writing, unless I'm just really inspired and on a roll, because I'll just sing along and not write - too distracting!