I really can't recommend @sgblank's book highly enough either. If you haven't read it, or aren't already familiar with the "Customer Development" methodology, I would definitely suggest you put that on your reading list. When I read it, my reaction was something like Keanu Reeves' in The Matrix - "Whooah". I felt like I saw the matrix. While you can never reduce something as complex as building a business down to a "paint by the numbers" process, TFSTTE is about as close to a "paint by the numbers" guide as you can find. It really lays things out in excruciating detail.