I don't know your teaching areas, so it's difficult to offer anything more specific. But "unplugging" from your textbook and allowing the content to "emerge" from the students may help you be more creative.
By the way, creativity is more of a spectrum, from simply doing the same thing in a different way to starting off in completely new directions with no constraints. So, you may find yourself beginning at one end of the spectrum and taking small steps rather than giant leaps.
Other approaches for consideration might involve using de Bono's "6 Thinking Hats," Gardner's "Multiple Intelligences" or Bloom's "Taxonomy" as a basis for designing new ways of interacting with the same course material. I'm sure others will also offer useful ideas to get you going. Please let me know if you are unable to locate links to these resources.
Best of luck, Greg.
Posted today at http://edupln.com/forum/topics/how-does-a-teachers-attitude