How to Win Friends and Influence People by Dale Carnegie should be required reading for everyone. It's full of things that are so obvious in hindsight but go against our natural instincts so we blunder through attempts to persuade not realizing that we might be increasing resistance rather than decreasing it.

Like the whole, "you might be right but you're still an asshole" thing. Being correct just isn't enough. In some cases you get crucified and then after some time has passed, the point you were trying to convince others of becomes the popular accepted fact. And they might even still hate you after coming around on the point you were trying to make.

That book won't turn you into a persuasive guru, but it will help avoid many of the pitfalls that make debates turn ugly or individuals stubborn.

Or, on the flip side, you can use the inverse of the lessons to become a more effective troll and learn how to act like you're arguing one thing while really trying to rile people up or convince them of the opposite. I say this not so much to suggest it but because knowing about this can make you less susceptible to it (and it's already a part of the Russian troll farm MO).