This document summarizes lessons learned by the author while developing their own startup. It discusses evolving from an independent research agency to a SaaS business. Key lessons include understanding customer needs and problems before solutions, building minimal viable products first to validate customer interest, using qualitative research methods to identify misconceptions early, valuing customer over user feedback, and iterating through manageable parts to improve products over time. The author emphasizes the importance of usability, but notes business value and customer understanding should come before UX.