The book Influence: The Psychology of Persuasion, looks like it’s an interesting read.
You can also watch a video overview of how these 6 ways break down:
..but for your convenience, here’s my summary in written bites:
6 ways of scientifically proven, ethical persuasion
1. RECIPROCITY: Give first, and give unexpectedly
Waiters and waitresses, and diners, take note!
Receiving a mint at the end of your bill at a restaurant, makes a diner more likely to give 3% more as a tip.
Receiving two mints, jacks their tip up 14% more.
If you give the mint, and then give extra mints after saying: “But for you really nice folks, here are some extra mints“, your tip will be increased by 23%.
2. SCARCITY: Tell them it’s (really) going away
One word: Twinkies.
If you tell someone that something is disappearing, and they buy it like crazy.
I heard a $4 box of them went for something like $100 on eBay.
3. AUTHORITY: Credibility & a uniform goes a long way
People in uniform are more likely to command respect from us, than in civilian garb.
You can also have other people introduce you with a small credible factoid about your skills, which will increase your credibility.
For instance, a secretary saying that for sales, she’ll direct them to someone who has 15 years of experience in sales, makes people 20% more likely to hire them.
4. CONSISTENCY: Small commitments lead to bigger ones
They have to be voluntary and actively participating in small commitments before they are able to agree to bigger ones.
5. LIKING: People give to those who are like them
Everyone prefers people who are like them — similar interests for instance can really help negotiations and having everyone cooperate towards a greater goal.
6. CONSENSUS: Actions and behaviours of others to determine their own
We are a big herd and there is no better example than the stock market.
We look and see other people selling, before we sell all our stocks in a panic and realizing our losses instead of waiting out the rocky period.