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Don't underestimate the power of smiling.
All it takes is the ability to pick up a few key social skills that build $4.
To help you out, we sifted through the Quora thread "$4," talked to an etiquette expert, and looked to some social psychology research.
Here are 16 simple ways to start crafting a "million-dollar personality" and become the most likable person in the room:
Kathleen Elkins and Natalie Walters contribute to an earlier version of this article.