Concept
Working Backwards
2 books in the library reach for this idea - each in its own way. When independent authors converge on one concept, it usually deserves attention.
The Everything Store
How this book uses it: Write the press release and FAQ before building. If you can't explain the benefit simply, don't build it.
Working Backwards
How this book uses it: Start with the desired customer experience, then determine what must be built. Write the press release first.