"Overcoming Cluttering Behavior Starts Here! Cluttering is about our emotions & psychology not just organizing skills. Cluttering is different than hoarding, but may be related to ADD, OCD, anxiety or depression."

http://clutterless.org/

There is also one called squalor survivors, you can google it or try http://www.squalorsurvivors.com -- this is for the truly clutter-prone!