Here is a link to a brief (about 5 minute) talk on creativity by top photographer DeWitt Jones. He shows the results of some of the ways he uses the principles of creativity when doing his shoots for National Geographic--and, as you'll hear and see, these are just as applicable to any creative endeavor.
When you get to the page, click on the little tab at the bottom left that says "Watch DeWitt Now." I had to pause the video for a minute or so to let it load:
(for practical tips on how to be more creative, see my book, "Creativity Now!" published by Pearson and available from Amazon and other online and offline booksellers.)