Another good one:
* Decoy Marketing: You offer customers a similar but inferior product to the one you actually want to sell, at about the same price

Nice study about an Economist subscription usiong decoy marketing can be found here:
http://www.neurosciencemarketing.com/blog/articles/decoy-marketing.htm

* Conformity (Asch)
* Bystander Effect / Diffusion of Responsibility (case study: Kitty Genovese)
* False Consensus Effect
* Obedience to Authority (Stanley Milgram, related to one of the most important lessons in business: “learning to say no to your boss”)
* Social Roles (Stanford Prison Study, Phil Zimbardo, related to understanding abusive work relations involving bosses and subordinates)
* Norm Formation (Sherif, related to establishing company cultures and changing them)
* Fundamental Attribution Error (Lee Ross, important for understanding and reversing negative work relationships)
* Diffusion of Innovation (Rogers)
* Pluralistic Ignorance (Lee Ross, related to people supporting bureaucracy and work politics)

Although not related to social psychology, I would also recommend that business people learn more about “different types of minds”. Temple Grandin’s “Thinking in Pictures” I think is a must read for any manager. Her recent TED talk “The World Needs all Kinds of Minds” is relevant as well. This topic is related to the “False Consensus Effect”. “Diversity in how people think” is important for building a business.