Since no one mentioned it so far I’m happy to recommend “Disciplined Entrepreneurship”, which I found more useful than Eric Ries’ book and very actionable. And

Since no one mentioned it so far I’m happy to recommend “Disciplined Entrepreneurship”, which I found more useful than Eric Ries’ book and very actionable. And above all, it really is a step by step guide: http://disciplinedentrepreneurship.com/ http://disciplinedentrepreneurship.com/