Perfectly executing the wrong plan (from Google I/O)

  1. You Didn’t Understand The Problem You Were Solving
  2. You Asked Your Friends What They Thought
  3. You Listened To Users Instead Of Watching Them
  4. You Didn’t Test Your Riskiest Assumption
  5. You Had A "Bob The Builder" Mentality 
Harsh but worthy presentation from Google. Full article available on FastCo