Memory and Obsessive-Compulsive Disorder

[Added June 2006]
Obsessive-Compulsive Disorder (OCD) episodes are experimented by almost anyone
and consist in irrational worries that let you perform rituals to neutralise them. For example you have to return many times to check that the home door or a faucet is closed. In this case you don’t remember that you have
closed the door. So the author of this How to Remember Amazing Amounts of Information says that it was enough for him to imagine , everytime he closed a door,
some weird thing happening to the door and the key, This would make the action
memorable and cure the ocd symptom.