It's an unfortunate fact: every creative type goes through artistic dry spells.
Happily, they don't need to last forever. I recently wrote what I think is an A+ article for Craftsy.com, regarding some tried and true ways to overcome artist's block.
While it's written from the point of view of a visual artist, the tips are fairly universal and can be applied to any creative process.
Check it out and save these ideas for the next time you're feeling stuck! And if you have a tip for you you combat creative blocks, please leave it here or on the Craftsy post!