Effective negotiators must have several key skills, including the ability to analyze problems to understand each party's interests, thoroughly prepare for negotiations by determining goals and alternatives, and actively listen to understand areas for compromise. They must also maintain emotional control during difficult negotiations and clearly communicate their position. Negotiators should foster collaboration, seek solutions that benefit all parties, and make timely decisions to avoid stalemates. Strong interpersonal skills, ethics, and reliability are also important for building trust between negotiators.