The document discusses negotiation skills, defining negotiation as a process of communicating between two or more parties to reach an agreement. It notes that negotiation involves behaviors like communication, psychology, and conflict resolution. The principles of negotiation include defining goals, establishing a neutral position, encouraging mutual understanding, and providing multiple solutions to reach an acceptable agreement. Different types of negotiation are discussed, like day-to-day negotiations at work, commercial negotiations involving contracts, and legal negotiations that adhere to laws. The negotiation process involves preparation, exchanging information, bargaining to shape a deal, and closing with commitments. Common mistakes in negotiation are also outlined.