The document discusses personas, goals, and scenarios which are important tools for interaction design. It recommends creating specific personas rather than general ones, focusing on one persona's personal goals rather than tasks. It also suggests developing daily, necessary and edge case scenarios to understand user needs, thinking beyond just functions to the relationship between computer and human.

1. Personas, Goals and Scenarios

2. “ It’s harder than you might think to squander a million dollars, but a flawed software-development process is a tool well suited to the job.” – Alan Cooper

6. “ It matters more that the persona is expressed with sufficient precision that it cannot wiggle under the pressure of development than it does that it be the right one.”