The document discusses several key concepts for interactive design: 1. Human factors - Ensuring usability, visibility, feedback and visual symbols. 2. Metaphor - Using familiar concepts to represent abstract ideas and suggest actions through perceived features. Metaphors should help users understand what to do and align with content. 3. Paradigms - Inspiring users through experiences that satisfy wants rather than just needs with an intuitive feel. 4. Usability - Removing obstacles, minimizing effort, and providing feedback and explicit, flexible and forgiving designs.