Don't reinvent the wheel, make it better : assembling analogs, antilogs, and leaps of faith to get to plan B -- Guiding your flight progress : the power of dashboards -- Air, food, and water : your revenue model -- Avoiding rocks and hard places : your gross margin model -- Trimming the fat : your operating model -- Cash is king : your working capital model -- It takes money to make money : your investment model -- Can you balance a one-legged stool? : multidimensional business models -- Getting started on discovering your plan B.