The document discusses common obstacles to successful negotiation, including lack of information, suspicion and mistrust between parties, being too rigid in one's positions, lack of time, impaired communication, playing the blame game, failure to understand the other party's interests, and lack of confidence. Each obstacle is explained with an example of how it can cause negotiations to fail or result in an unsatisfactory outcome for both sides. The document advocates for building trust, flexibility, clear communication, empathy, understanding interests, and preparation to overcome these obstacles.