I saw this presentation from Tara Hunt on Dave Kellogg’s blog. Dave is CEO of Mark Logic where they are doing some amazing things with XML and content management. In any case, this preso is exceptional. It touches on a number of optimization factors that I feel very strongly about and incorporate whenever possible, namely user control, creating flows, alleviating confusion and consideration. My favorite slide of all — “you just can’t build prediction models for this stuff.” It’s worth your time.