This document provides guidance on negotiating to reach a WIN-WIN outcome. It discusses the differences between haggling, which results in WIN-LOSE situations and damages relationships, and cooperative negotiation, which aims to find mutually acceptable solutions. The key stages of negotiation are preparation, discussion, clarifying goals, negotiating towards WIN-WIN, agreeing and implementing the agreement. Preparation involves understanding interests and alternatives. Discussion involves presenting cases and listening. Clarifying goals identifies common ground. Aiming for WIN-WIN focuses on gains for both sides. Failure to agree may require further meetings. The overall goal is an agreement that leaves both parties feeling they have obtained benefits.