This document discusses 6 rules for responsive web design: 1. Responsive design doesn't end with squishy layouts - optimize based on user capabilities rather than just screen size. 2. There is no responsive pixie dust - streamline workflows and use rapid prototypes and style tiles to communicate fluid layouts. 3. Your workflow will change - iterate designs quickly through prototypes rather than big reveals. 4. Your tools will change - leverage preprocessors like SASS and frameworks like Foundation for responsive coding. 5. The web is responsive by default - prioritize content and build APIs to support multiple platforms. 6. Embrace unpredictability - acknowledge the constraints of different devices