This report provides a developmental perspective on what competencies young people need to be ready for college, the workplace, and the transition to adulthood. National hand-wringing about the lack of preparedness of high school graduates for college and the workplace has catalyzed researchers, educators, and policymakers to define the skills and competencies students need in order to be successful. These prescriptions tend to focus "either" on college readiness "or" on workplace readiness. At the same time but on a separate track, youth development research has identified the assets that youth need in order to make a successful transition to adulthood. Presumably, these three groups of competencies should overlap. Do high school students need the same competencies in order to be ready for college, the workplace, and a healthy transition to adulthood? If so, is there agreement on what competencies are needed? If not, how do the necessary competencies differ across these three areas of life? Are there some competencies which are emphasized for healthy youth development which could be usefully applied to remedy gaps in college and workplace readiness, and vice versa? This report seeks to widen the road to success for high school students. It also provides a sense of the degree to which research in each field indicates a need for each competency. The competencies needed are organized into five domains of youth development: physical, psychological, social, cognitive, and spiritual. Because certain groups of students have particular challenges in being successful, this report also focuses on strategies that have proven helpful for groups that face greater challenges in meeting the readiness criteria for college, the workplace, and the transition to adulthood. These include low-income and minority students, Latinos and English language learners, students with disabilities, disconnected youth, youth aging out of foster care, and sexual minority youth. (Contains 1 footnote.)