One of my favorite books about creative journaling is 1000 Journals. For this project, an artist named Someguy mailed 1000 blank journals to friends and strangers and asked them to write/draw/create an entry, then mail the journal on to another friend or stranger. It was an elaborate chain-letter, I suppose, but without the bad-luck consequences. The book shows facsimile pages from some of the journals, some written, some elaborately drawn or collaged. It is an instant creative kick-in-the-pants for sluggards like me.
Now Tea With McNair has informed me that there will soon be 1001 blank journals circulating around the world. You can go to the 1001 journals site to sign up to participate in the new project.