While I briefly ran a 'start up' with a friend (we weren't what most people here would consider a start up), we used the book 'Business Model Generation' almost

While I briefly ran a 'start up' with a friend (we weren't what most people here would consider a start up), we used the book 'Business Model Generation' almost weekly as we adjusted our business and pitched for new work. I still go back to that when kicking off a new project.