Key qualifications, action competencies, communication skills, and social competencies are just as important for young people today as technical knowledge in order to succeed in training, school, university, and their careers. This book provides a compact overview of the 50 most important skills from four different competency areas, aimed at young professionals, students, and pupils, as well as lecturers, teachers, and trainers. It addresses what one needs to know and be able to do to be professionally successful today, offering practical foundational knowledge along with concrete tips and application guidance.