It fundamentally changed how I viewed debates etc. from a young age so I never really sea-lioned that much hopefully.
But if I had to summarize the most useful and on topic quote from the book its that.
"I may be wrong, I usually am"
Lines like this give me a humble nature to fall back on. Even socrates said that the only thing I know is that I know nothing so if he doesn't know nothing, then chances are I can be wrong about things I know too.
Knowing that you can be wrong gives an understanding that both of you are just discussing and not debating and as such the spirit becomes cooperative and not competitive.
Although in all fairness, I should probably try to be a more keen listener but its something that I am working on too, any opinions on how to be a better listener too perhaps?