Hand-picked links to help you write. (This list may take a while to be fully formed.)
http://www.wakeupwriting.com/archives/date/2002/05 - There doesn't seem to be new material but going back to old entries there're plenty of exercises.
http://www.gkbledsoe.com/articles/process/writing_prompt_generator.html
what fun! I personally can't wait to write about the 'adorable little bell pepper [that] went to the movies'