How to get anything you want, from anyone:
1) Shed any preconception of morality, ethics, or other rules of conduct.
Accept that humans don't deserve your respect until they give you cause to think otherwise. The only relevant consideration in your choice of interactions with others is how they can or can't benefit you. People are just simple calculators and meat in fleshy suits; consider and use them as such. Should one break rank and demonstrate an objectively valuable and uncommon consciousness, only then should you consider its potential merits as a living thing.
2) Give up your instinctual devotion to truth, logic, and all rationality.
Understand that 99/100 people are more than happy to live entirely in delusions, and that of those, easily 9/10 of them live with an unshakable belief that those delusions are exactly what they really want. By their 20s, most people have given up all attachment to objective reality. In order to interact on their level, you must at least understand this pathology. They only need to be managed.
3) Take nothing personally.
To the idiot masses, you are simply a figment of their imagined reality in a somewhat more tangible form. Your only potential value to these morons is in the form of an essential object in their existing delusions; your actual objective value or worth as a human being is categorically vestigial to the psychology of human society - so you must learn to understand that these fleshbags aren't actually ever interacting with you at all. To take offense is illogical.
4) Manipulate.
Learn the landscapes, characters and ideas central to their delusions, study the simple repetitive patterns of their interactions and the subsequently shallow, boring behavioral routines that result - then insert yourself as one of the controlling ideas. Lie. When they believe you, insinuate your lie further into their delusion, until you control its direction.
That is all there is to this.
— and that is, frankly, about all there is in general.
