This might sound like complete and utter bullshit... but try listening to music that has a big emotional impact on you. It's a great way of generating meaningful and thoughtful narrative ideas, and it'll "set the mood" inside your head, allowing for directed creativity. All you have to do is translate whatever you come up with into text. No easy task by any measure, but that's the mark of a good writer: someone who can weave emotional depth into mere words, and attract a reader's psychological investment. Successfully make the reader feel what the protagonist feels, and they'll be completely immersed.
Trust me, music can be a useful (albeit slightly unconventional) psychologically-influential tool.
And yeah, you'd be smart to listen to others that have posted already, as many of them are speaking from personal experience.