Getting Real is now available for free as a PDF book. It has been a few years since I last read it but I remember it fondly:
Want to build a successful web app? Then it’s time to Get Real.
Getting Real is a smaller, faster, better way to build software.
Getting Real is about skipping all the stuﬀ that
represents real (charts, graphs, boxes, arrows, schematics,
wireframes, etc.) and actually building the real thing.
Getting real is less. Less mass, less software, less features,
less paperwork, less of everything that’s not essential (and
most of what you think is essential actually isn’t).
Getting Real is staying small and being agile.
Getting Real starts with the interface, the real screens that
people are going to use. It begins with what the customer
actually experiences and builds backwards from there. This lets
you get the interface right before you get the software wrong.
Getting Real is about iterations and lowering the
cost of change. Getting Real is all about launching,
tweaking, and constantly improving which makes
it a perfect approach for web-based software.
Getting Real delivers just what customers need
and eliminates anything they don’t.