There is a great post on ISO50 discussing with 25 artists how they overcome a creative block. Bottom line, it varies from person to person. What to truly gain from the article is a comfort in knowing it happens to everyone. My strategy generally involves not trying (or making fun of my lameness). Genius right. I however do not have any sort of career that is dependent on my creative juices, as much as I wish I did. That would be a fun challenge.
[ Link via Swiss Miss ]