Okay, now before you freak out, I just want to say it’s nothing drastic. Seriously.
I just want you to listen to a different type of music as you write. Listen to metal if you typically listen to pop. Listen to country if you typically listen to punk rock. Listen to power ballads if you typically listen to dubstep.
Step out of your normal, safe bubble and listen to something completely different from what you ordinarily listen to. See how it influences your writing.
Does your writing style or plot or character development change based on the music or your opinion of it? Explore the world of music a bit. Expand your horizons.
It’s always worth a shot, even if you only do it this one time.