Being inspired by art.
I went to the Art Institute of Chicago recently. It's always good to spend some time being inspired by the masters. The Gustave Caillebotte exhibit was incredible; seeing his sketches and how photography influenced his later work was interesting to learn about. What I was most inspired by was his use of light.
With that in mind, I will be more aware of the light when creating new images with my camera.
If you've never been to the Art Institute in Chicago, I highly recommend it.