ASCII. Enter your zip code to win! [ ] [Give me free money] The first step isn't design or layout, it's interaction. You should do many in

ASCII. Enter your zip code to win! [ ] [Give me free money] The first step isn't design or layout, it's interaction. You should do many interaction-only prototypes with NO design and NO layout first. When you understand the core interaction flows, some good candidate layouts will be self evident, and you can iterate on the design. The most valuable thing your early prototypes can tell you is which features you can get away with leaving out for V2. You probably only need three features that can be built with 100 lines of code. The problem it's it's extremely difficult to understand what those 100 lines are. Most companies spend millions before figuring it out, but you don't need more than pencil+paper to do it. You really don't need CSS until after your first sale.