Because computers have memories, we imagine that they must be something like our human memories, but that is simply not true. Computer memories work in a manner alien to human memories. My memory lets me recognize the faces of my friends, whereas my own computer never even recognizes me. My computer's memory stores a million phone numbers with perfect accuracy, but I have to stop and think to recall my own.

Just how do I design if not with prototyping? An excellent question. The short answer is 'on paper.'

Define what the product will do before you design how the product will do it.

Computers no longer interface with humans--they interact, and the interaction will become steadily deeper, more subtle, and more crucial to our collective sanity and ultimate survival.

Men do not greet one another like this ... except perhaps at rugby club dinners.

A powerful tool in the early stages of developing scenarios is to pretend the interface is magic. If your persona has goals and the product has magical powers to meet them, how simple could the interaction be? This kind of thinking is useful to help designers look outside the box.

We don't fight about music. We don't fight about artistic direction. The things like that we could fight about, we really don't. We are pretty lucky for that.