The diversity of people who visit web-sites is usually greater than ever happened with printed material and meetings. Look for the differences. Understanding of your subject domain. - Levels of patience.
Some experienced users can act like stereotypes.
Use them when preparing the quality profile and studying prototypes. Being cool is hard work. Adaptations and extension often cost more than the original website creation. Define business Goals . For each goal subdivide into a set of specific issues, or express them as Questions .