Reading a story to your child before going to bed is the best example of a sucessful win-win negotiation.

At the beginning, there is no contract zone : he doesn't want to go to sleep. Than the value proposition comes :

"I read you a story and you go to bed."

"OK"

Deal ! And a win-win : being together to read a story is a real pleasure for both of us.

But children are excellent negotiators, when the story is finished they don't want to leave something on the table :

"Another story, Pleeeaaase?"

There you need the best of your sales skills : Objections handling and Closing... of the light.