I just came across a great video that gives some great perspective on creative pursuits called Everything is a Remix. It reminds us that great innovations are always the result of copying, transforming and combining existing ideas.
As artistic professionals, we’re always seeking out the the elusive Original Idea, and getting too bogged down with that pursuit can hurt our productivity. Part 3 in the series is especially good, and gives some great examples of world-changing technologies that came only after someone successfully improved on existing ideas. Check out the rest at http://everythingisaremix.info