"Blessed are the forgetful: for they get the better even of their blunders." - -- Friedrich Nietzsche
A memory jogger for a book I read a while ago (Beyond Good and Evil) was "The eternal sunshine of the spotless mind". All in all it was a very predictable film but it had some important themes, maybe it was just important because I don't forget very many things often. They just stick.
"The world forgetting, by the world forgot.
Eternal sunshine of the spotless mind!
Each pray'r accepted, and each wish resign'd"
- Alexander Pope