This document discusses concepts from behavioral science and economics that can help understand human behavior. It explains that classical economics assumes people act rationally with complete information, while behavioral science incorporates findings from psychology about cognitive biases. It then outlines seven core concepts from behavioral economics: 1) cognitive ease and System 1 vs System 2 thinking, 2) priming and framing, 3) status quo bias, 4) heuristics, 5) loss aversion, 6) defaults and nudges, and 7) commitment devices. Each concept is defined and an example application is provided to illustrate how it can inform messaging or program design to influence behaviors.