It is upsettingly easy to work hard without being productive. The Lean Startup includes a quote I really liked: “[People] feel that a good day is one in which they did their job well all day.” The point being that this doesn’t account for whether you are doing the right work. This is a really common trap to fall in to. I know I have often worked really hard on something and produced code I’m very happy with, only to talk to my boss or the client and find that nobody else seems to be n...