I'd recommend http://blog.samaltman.com/before-growth http://blog.samaltman.com/before-growth "I think the right initial metric is “do any users love our produ

I'd recommend http://blog.samaltman.com/before-growth http://blog.samaltman.com/before-growth "I think the right initial metric is “do any users love our product so much they spontaneously tell other people to use it?” Until that’s a “yes”, founders are generally better off focusing on this instead of a growth target."