Listen to some calm/cherry music, it may help. But you will completly forget it when you'll be highly focused. Personaly, when i'm reading or writing, i listen to either the card captor OST, or some stuff like that.
Or just listen to death metal, i sometimes do that.
Don't listen to anything new or with too many words, try and find something that is familiar, with as little to no words as possible, and listen to it real low. Or, just wear headphones. Either that, or find a song which kinda... matches the story, listen to it a few times, then keep it low and start. Music can help with writing a ton. What matters is how the music makes you feel.
Sorry, nerding out here.
Or just listen to death metal, i sometimes do that.