This document provides tips and guidance for talking to users at different stages of a product development process. It discusses common mistakes to avoid like talking about your idea rather than the user's problem. It provides example questions to ask users like what is hardest about a particular task or problem. The document also describes how talking to users can be useful at the idea, prototype, and launched stages, including how to find initial users and identify best first customers to get feedback. It emphasizes keeping user interviews casual, taking notes, and being respectful of users' time.