Roger von Oech over at Creative Thinking has an interesting post on the art of forgetting.
One of the major obstacles to making change in business is "tribal custom."* Tribal custom is what keeps employees doing redundant, inefficient or useless tasks because "that is the way we have always done it." If only we could manage to attain some creative forgetting, processes could be tested and improved.
*A term I will attribute to Jack Duffy until corrected.