This summary provides the key points about negotiating tactics from a document about the book Never Split the Difference by Chris Voss. The document discusses 9 principles for successful negotiations from Voss's experience as an FBI hostage negotiator. It summarizes that listening and understanding the other perspective are essential to gain trust and information. Specific tactics discussed include mirroring language and emotions, getting the other party to say "no" or "that's right", using deadlines strategically, and anchoring perceptions to shape negotiations in your favor. The overall message is that empathy, control of the conversation, and bending the other party's reality are crucial components of effective negotiations.