This probably isn't the immediate answer you're looking for, but I've found a lot of value in a book called Never Split the Difference by Chris Voss (no affiliation, just loved the book.) It provides practical guidance on the subject of negotiation. However, in reading it you'll find that a lot of these rules of negotiation apply to broader aspects of life. The author, Voss, was a former negotiator for the FBI and wa…
I find myself actively fighting the impulse to read the book. I can't decide if I'm a savvy, advertising-aware consumer; or maybe I'm just another sucker.