It's very enlightening to spend some time listening to non-technical people describe their computer problems. For anyone developing software to be used by mere mortals, I recommend it. Recently, I overheard a couple of choice quotes at the Genius Bar in the Palo Alto Apple Store:

"...and so I bought a home network. The box it came in said it was 'wireless ready' but normally I find that means it's really not."

Upon finding out that the error with her computer was something that she herself was doing, a flustered and frustrated middle-aged woman huffily remarked:

"I'm going to switch back to a PC. It was so much nicer when it was always their fault."