This is a really helpful outline. I like your idea of keeping a "features" list and "questions" list separate. Otherwise, it gets confusing when the two get ju

This is a really helpful outline. I like your idea of keeping a "features" list and "questions" list separate. Otherwise, it gets confusing when the two get jumbled together. One tool that most hardcore engineers chuckle at - but that I love for the higher fidelity mockups - is using Keynote/Powerpoint. It is extremely fast to make things like buttons, move text around, etc. Most importantly, these tools make super easy to make a duplicate of any view and completely overhaul the layout...giving the ability to show users A/B options for the same slide. Finally, it's easy to export the entire "app" mockup as one PDF file (made of many slides) and share all the mockups with users. I like it as a last step before diving into actual CSS/HTML. I like this more than Balsmiq because it lets me get closer to pixel perfect before I start coding - emphasis on actual look & feel, vs functionality (which balsamiq is probably faster at depicting). Anyway, great writeup, thx for sharing.