This document discusses how applied psychology can improve software engineering practices. It begins with an introduction to psychology and some of its main branches like cognitive, personality, social, and industrial-organizational psychology. It then explains how software engineering involves human activities like problem solving, decision making, and social interaction, making applied psychology relevant. Some ways psychology could help include improving communication, leadership, collaboration, and adapting to change. The document concludes with tips for achieving work-life balance and enjoying both work and personal life.