7 tricks for getting people to do what you want

Dr. Robert Cialdini, author of "Influence: The Psychology of Persuasion," lists "liking" someone as a major "weapon of influence."

According to the American Psychological Association, when we have a good feeling about someone, we're more likely to find them persuasive.

That's not too surprising. Still, for anyone that's a bit shy or awkward, that probably sounds easier said than done. However, as Business Insider previously reported, there are a few habits that you can get into in order to come across as more likeable.

Would you buy something from a saleperson who's slouching, fidgeting, and avoiding eye contact? Of course not! They could be the most honest person in the world, but it wouldn't matter. Their body language projects a lack of confidence at best, deception at worst.

If you're going to become persuasive, you've got to brush up on some body language tips and start looking the part.

"Words, words, words," as Hamlet said.

Repetition can be pretty annoying. In writing, it's horrendous if overdone. In conversations, it's brutal (we all know someone who keeps cycling between the same few anecdotes — or, if you're like me, you are that person).

However, repetition in speeches and pitches isn't necessarily a bad thing. Plenty of famous speakers employed rhetorical devices that involved repetition. Feel free to adopt it to emphasize and drive hope your point.

The American Psychological Association reports that Cialdini found "reciprocity" is a key factor in persuasion.

This makes perfect sense. People tend to be more comfortable supporting individuals who've demonstrably done something for them.

So it's not a bad idea to start establishing a network of people that "owe you one."

When you're trying to present a convincing point, it can be difficult to strike a good balance. You don't want to appear passive, but you also don't want to come on too strong.

John Brandon of Inc. writes that it's probably better to air on the side of honesty and politeness:

"Some of the most miserable people I know have this attitude about persuasion that it's all about cajoling others. You try to trick them — usually through a stern attitude or a demanding voice — to get what you want. It doesn't really work, unless 'what you what' is the same as feeling miserable."

What makes gold, diamonds, and Ninetales so valuable?

Scarcity.

According to the American Psychological Association, scarcity it another one one Cialdini's principles of persuasion.

People tend to value what is rare and unusual. It can be tricky sometimes, but try to use hat psychological quirk to frame and construct a convincing argument.