Gary Klein, Ph.D., is known for the cognitive models, such as the Recognition-Primed Decision (RPD) model, the Data/Frame model of sensemaking, the Management By Discovery model of planning in complex settings, and the Triple Path model of insight, the methods he developed, including techniques for Cognitive Task Analysis, the PreMortem method of risk assessment, and the ShadowBox training approach, and the movement he helped to found in 1989 — Naturalistic Decision Making. The company he started in 1978, Klein Associates, grew to 37 employees by the time he sold it in 2005. He formed his new company, ShadowBox LLC, in 2014 and is the author of five books. The Lightbulb Moment: Insights are unexpected shifts in the way we understand how something works, and how to make it work better. The talk examines two mysteries. First, where do insights come from? This talk presents a new account of the nature of insights. Second, how can we trigger more insights? This talk describes a strategy for adopting an insight mindset.