The book introduces the social science foundations of practical professional action and is relevant for students of all disciplines who want to acquire not only professional expertise but also the fundamentals for developing social skills for a successful career entry. At the same time, the book provides assistance for those already in the workforce who seek explanations for certain behaviors and want to positively and purposefully manage interactions with people in the workplace. For the identified target groups, general rules of communication are first presented as the basis for any professional behavior, along with the fundamentals of successful conversations. Whenever people collaborate, group processes occur that need to be managed. For this, it is essential to have basic knowledge in the areas of leadership and motivation.