Optimal persuasion is achieved through optimal pre-suasion: arranging for people to agree with a message before they know what's in it.
Pre-suasion is about establishing your credibility and relationship. And you can do that by building trust, showing vulnerability and learning to make fun of yourself.

Pre-suasion

When it comes to persuading people, the trust often matters more than the content of your ideas, and you get people to trust you by demonstrating that you're all on the same team.

Build unity

Although counterintuitive, admitting your errors upfront shows that you're human and can actually be a brilliant move.

Admit mistakes

Showing vulnerability can, paradoxically, strengthen your argument.You can do this by admitting missteps, but you can also strive to come across as more human and believable by making fun of yourself.

Make fun of yourself

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If you want to <a href="https://www.inc.com/jessica-stillman/5-persuasion-tricks-you-can-steal-from-con-artists.html">persuade others</a>, there are endless tips and tricks available. Most of them tell you how to package your argument to make it as convincing as possible, but according to psychologist Robert Cialdini, even if you heed every bit of advice out there on the topic, you've still ignored the most important part of persuasion.
A huge chunk of persuasion happens before people even know what you're <a href="https://www.inc.com/david-finkel/the-5-most-powerful-sales-techniques.html?cid=search">selling</a>, he says. This " <a href="https://www.amazon.com/gp/product/1501109790/ref=as_li_tl?ie=UTF8&amp;camp=1789&amp;creative=9325&amp;creativeASIN=1501109790&amp;linkCode=as2&amp;tag=inccom05-20&amp;linkId=39eded736e1ca8e4a3c842cad10cfeea">pre-suasion</a><img src="https://ir-na.amazon-adsystem.com/e/ir?t=inccom05-20&amp;l=am2&amp;o=1&amp;a=1501109790">" is all about establishing your credibility and relationship, and it's often the difference between people embracing your ideas or tuning you out.
"Research done in the last 15 years shows that optimal persuasion is achieved through optimal pre-suasion: the practice of arranging for people to agree with a message before they know what's in it," <a href="http://www.latimes.com/opinion/op-ed/la-oe-cialdini-presuasion-20161023-snap-story.html">he writes in The Los Angeles Times</a>.
So how do you learn this skill? You can do a lot worse than observe billionaire investor <a href="https://www.inc.com/carmine-gallo/warren-buffett-and-the-power-of-analogy-to-sell-your-ideas.html?cid=search">Warren Buffett</a>, Cialdini says.
1. Build unity 
When it comes to persuading people, trust often matters more than the content of your ideas, and you get people to trust you by demonstrating that you're all on the same team. Buffett knows this and demonstrated it in his 2015 letter to shareholders.
Aiming to convince readers that his company, Berkshire Hathaway, could continue its improbably long run of incredible success, he opened by saying that the message contained in the letter, was "what I would say to my family today if they asked me about Berkshire's future." That's a masterstroke, according to Cialdini.
"The result was a flood of favorable reaction to the letter (with headlines like 'You'd be a fool not to invest in Berkshire Hathaway' and 'Warren Buffett just wrote the best annual letter ever'), as well as a per-share increase for the year of nearly five times that of the S&amp;P. I can say that, as a Berkshire Hathaway stockholder, I have never since thought of selling any shares. After all, Buffett had given me the same recommendation he first declared he'd give to a family member," he comments in the article.
2. Admit mistakes 
Admitting your errors upfront might sound like a terrible way to persuade people. After all, who would have confidence in someone who bumbled badly in the past? But Buffett proves that <a href="https://www.inc.com/jessica-stillman/the-1-mistake-that-will-totally-sabotage-your-leadership.html">showing you're human</a> straight off can actually be a brilliant move, Cialdini says.
On <a href="https://www.inc.com/jessica-stillman/10-podcasts-that-will-make-you-smarter.html">The James Altucher Show</a> (hat tip to <a href="http://www.businessinsider.com/robert-cialdini-how-warren-buffett-gets-his-shareholders-to-trust-him-2016-9">Business Insider</a>), Cialdini praised Buffett's 2012 shareholder letter for this reason. Buffett kicked it off with an admission that "for the ninth time in 48 years, Berkshire's percentage increase in book value was less than the S&amp;P's percentage gain."
"It's disarming every time he says, 'You know, we made this mistake.' I believe the next thing he says to me--and that's where he puts the strength of the last year," Cialdini explains. "He's just readied me to listen to and process the next thing he's going to say more deeply because he's established himself as a trustworthy source."
3. Make fun of yourself 
Buffett understands that showing vulnerability can, paradoxically, strengthen your argument. As we saw in the last section, he does that by admitting missteps, but he also strives to come across as more human and believable by making fun of himself.
Every year, at their annual shareholder meeting, Buffett and <a href="https://www.inc.com/jessica-stillman/10-book-recommendations-from-warren-buffett-s-right-hand-man.html">his right-hand man Charlie Munger</a> play a video that makes them the butt of jokes. These videos "humanize them and make them seem like they're not arrogant, know-it-all types, but very much in keeping with the image of who they are as honest, straight-talking people who will reveal their foibles if those foibles exist," <a href="https://finance.yahoo.com/news/buffett-munger-use-pre-suasion-get-people-listen-160752820.html">Cialdini told Yahoo Finance</a>.
The opinions expressed here by Inc.com columnists are their own, not those of Inc.com.
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If you want to persuade others, there are endless tips and tricks available. Most of them tell you how to package your argument to make it as convincing as possible, but according to psychologist Robert Cialdini, even if you heed every bit of advice out there on the topic, you've still ignored the most important part of persuasion.

3 Killer Persuasion Techniques You Can Learn From Billionaire Warren Buffett

Pre-suasion

Build unity

Admit mistakes

Make fun of yourself

Isabel G.'s ideas are part of this journey:

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