How much more granular could you get than that?  Immersion, to the point that nothing else matters.  Isn’t that why you got into this gig in the first place?  To get carried away by your own inner voice and have other people be thrilled by it?

Dive into your story, but go deeper.  Become it in a metaphysical sense, walk the walk of your protagonist, fear your villain, twist and manipulate the reader to the point that you’ve taken him somewhere he never imagined… as well as yourself.

Go fire it up.