This document discusses negotiation tactics and presents information on both fair and unfair negotiation strategies. It begins by defining negotiation and describing common negotiation tactics such as preparing your mental model, taking an interest-based approach, reframing issues, and knowing when to say no. It then outlines unfair "dirty" tactics like misleading the other party, applying psychological pressure, and positional pressure. Finally, it provides four ways to defend against unfair tactics, such as ignoring them, acknowledging them, requesting the other party stop, or terminating the negotiation.