21 business-etiquette rules every professional should know

Professional social situations can be awkward. And, unfortunately, many people wind up making fools of themselves because they don't understand that etiquette rules in business differ from those in other settings.

In "The Essentials of Business Etiquette," Barbara Pachter writes about the rules people need to understand to conduct and present themselves appropriately in professional social settings.

We looked through the book and spoke to Pachter to find the most important tips on how to introduce yourself, how to dress, and what to order at restaurants.

As it turns out, a lot of these rules should be followed in everyday life as well as business.

Vivian Giang contributed to an earlier version of this article.