Here is a great video that talks about a method of User Experience design that suggests that we should design for the user AS IF (s)he is blind drunk (she’s probably not actually drunk).

High points:

• Great UI isn’t there
• UI should generally be as effective when it is blurry as when it is not
• Guide them through the process as though they were blind drunk
• Say it Twice
• Emotion matters
• Say it Twice
• Design for drunk user, not dumb user (don’t talk down or be Overly simplistic to user)