The following video was shot by Google in New York. They asked random people on the street the question: What is a Browser? People who work in the IT industry will probably cringe or even laugh when the hear the answers. But it is important to accept that these persons are your average users! When you design your next user interface keep in mind that not everybody studied IT. Build software which everybody can use which is probably still one of the hardest problems the IT industry has to tackle.

See also my post about guerrilla testing.