This book examines a variety of assumptions prevalent in the mental models of undergraduates, parents, educators, higher education leaders, administrators, and policymakers that cause people to fall into a series of mental traps when selecting a major. Divided into three parts, this publication presents a situational analysis on choosing a college major, dissects the mental models and traps people rely on, and offers a variety of assessments that can help increase one's self-awareness prior to declaring a major.