Successful leaders have one thing in common: they are experts in social interaction. They express themselves clearly and effectively, understand their colleagues, and adapt to all situations. As a leader, you need to not only be able to inspire, motivate, and convince those around you, but also listen, be attentive, and adapt to your co-workers. It is by combining these skills that we obtain the Leaderspritz: an interpersonal leadership cocktail. This manual presents the ingredients necessary to become a good leader. It describes the concrete tools that will enable you to improve your interpersonal skills, including how to give charismatic presentations, organize an effective meeting, manage conflicts, negotiate successfully, and give constructive feedback. Written by experts in the field of leadership education at university and corporate levels, Leaderspritz is based exclusively on scientific research. Whether you are currently in a leadership position or about to become a leader, student, or teacher, this solid and interactive reference, rich in empirical results, anecdotes, scientific theories, and practical tools, will allow you to improve your skills and successfully carry out your responsibilities.