Starting a new business is not the same as running an operating business. As Steve Blank puts it "a startup is an idea looking for a business model". Over the last decade a number of management practices have emerged that recognizes the particular challenges facing new ventures. In particular, Blank's Customer Development Model and the related "Lean" movement are increasingly popular with entrepreneurs of all sorts. This lecture introduces and define the key concepts of the new entrepreneurial management practices and illustrate how startups can utilize them at any step of their process.