'Constantly seek criticism. A well thought out critique of whatever you're doing is as valuable as gold and you should seek that from everyone you can but particularly you're friends. Usually your friends know what's wrong but they don't want to tell you because they don't want to hurt you. They say 'Oh I want to encourage my friend so I'm not going to tell him what I think is wrong with this product.' It doesn't mean you friends are right, but very often they are right. And you at least want to listen very carefully to what they say and to everyone. You're looking for, basically you should take the approach that you're wrong. That you the entrepreneur are wrong. Your goal is to be less wrong.' https://www.youtube.com/watch?v=0Bo-RA0sGLU