Betty

“Reciprocity—whereby people are more likely to do something in return of a favor, regardless of the favor done and the ask now presented to them Commitment and consistency—people who have taken one action are likely to take another, regardless of the size or difference in action Social proof—in a state of uncertainty, people look to the actions of others to help them make their own decisions Authority—people look to those in the position of authority to decide which actions to take Liking—people will do business more readily with people and companies they like over those they don’t or are indifferent to Scarcity—people will take action when they are worried that they will miss out on the opportunity in the future”
― Sean Ellis, Hacking Growth: How Today's Fastest-Growing Companies Drive Breakout Success

“I think there are probably too many smart people pursuing Internet stuff, finance, and law,” Musk said on the way. “That is part of the reason why we haven’t seen as much innovation.”
― Ashlee Vance, Elon Musk: Inventing the Future