Never seem to be selling something—that will look manipulative and suspicious. Instead, let entertainment value and good feelings take center stage, … - Robert Greene

When choosing people to work and associate with, do not be mesmerized by their reputation or taken in by the surface image they try to project. Instead, train yourself to look deep within them and see their character. People’s character is formed in their earliest years and by their daily habits. It is what compels them to repeat certain actions in their lives and fall into negative patterns. Look closely at such patterns and remember that people never do something just once. They will inevitably repeat their behavior. Gauge the relative strength of their character by how well they handle adversity, their ability to adapt and work with other people, their patience and ability to learn. Always gravitate toward those who display signs of strength, and avoid the many toxic types out there. Know thoroughly your own character so you can break your compulsive patterns and take control of your destiny.

Napoleon advised: Place your iron hand inside a velvet glove.

You have to know how other people think before you craft the right kind of response.