The saying goes, "Garbage in; garbage out." Creativity can be reapplied to this saying. If your creativity output is lacking, take a look at your intake. Are you listening to the same music over and over? Find a new artist and see if your creativity does not take a new jolt. Try an entirely different genre than your usual and see what new ways your creativity is sparked. Listen to some more creative podcasts (search "spoken word" "TEDTalks" "IndieFeed" or "The Moth" to get started)
Do you only read a certain kind of book? Mix up between fiction and non-fiction, leadership and fun, self-help and trash. Browse more magazines. (you don't HAVE to read every article)
Watch a more artistic movie (I think you're supposed to call them "films").
Change your intake of things and see whether your creative output doesn't begin to change in return.
What are your most inspirational intake?