1. idea 2. list features in order of importance 3. select top 50% of 2. 4. paper mockup with various iterations 5. code 6. revise with external feedback (u

1. idea 2. list features in order of importance 3. select top 50% of 2. 4. paper mockup with various iterations 5. code 6. revise with external feedback (usability study?) 7. go to 3/4/5.