How do villains use the laws of power to manipulate villains both in the novel and in real life?

Propaganda. Hell runs incessant ads in newspapers, in magazines, on billboards, and on TV to encourage people to turn to Satan and turn their souls over to Hell. He appeals to lust and greed in everyone. By advertising Hell in this way, Satan is cheating on his pact with God not to interfere with human beings. Satan also schedules Luna for early demise to further his control over mortal Earth and bring more souls into Hell.

When Zane defies Satan, Satan tries to convince Zane that his side is the best. Although Zane knows that Satan's ads encourage sin, Satan portrays Hell as a place where sinners learn to repent their evil and are therefore cleansed to go to Heaven. Zane is taken in by Satan, until Molly Malone reveals that this is just another pack of lies from the Prince of Lies. Satan tries to bribe Zane with sexual pleasures and convince him with untruths, but Zane remains defiant.

Finally, Satan unleashes Hellhounds and monsters to track down Zane. All of Satan's show of strength is a lie, as well. He is essentially powerless against Zane in the realm of Death. All decisions about the soul leaving a body are in the province of Zane alone, and although he can be influenced, he cannot be overthrown, As long as Zane knows his own power, there is nothing Satan can do to counter him. Satan, ultimately, is a bully and a blusterer.

The use of propaganda is just as prevalent today, though today the billboards have converted to technology, and the truth is often overwhelmed by incorrect information.