The truly great consumer technology companies of the past 25 years have all had one thing in common: they created habits. This is what separates world-changing businesses from the rest. Apple, Facebook, Amazon, Google, Microsoft, and Twitter are used daily by a high proportion of their users and their products are so compelling that many of us struggle to imagine life before they existed.

But creating habits is easier said than done. Though I’ve written extensively about behavior engineering and theimportance of habits to the future of the web, few resources give entrepreneurs the tools they need to design and measure user ha