I highly enjoy stories that pull from everything: mythology, folklore, religion, literature, etc. It's just so much more refreshing than reading something where the writer just makes shit up about demons and ghosts and other various things. It seems more legitimate. More erudite, if you will.
Here's something to do in between (or let's face it, instead of) (and creators, you know the days I'm talking about) writing or drawing or whatever you do: Read a piece of folklore, mythology, or even a fairy tale each day. Just one story from someone's culture.
And who knows. Maybe you'll get inspired and create something of your own.