Via Creative Live, I spotted this interesting post, Three Reasons You Should Pay Attention To Creative Blocks written by Shane Mehling.
I like what Shane says about facing a blank canvas:
"If you’re staring at a blank canvas, it’s time to fill your head with new creations that you’ve never seen before. Go to museums or bookstores or the library or just search through the Internet. Find something that really wows you and the block will start being chipped away."
Check out the complete post for more ideas.