Emily Post's Etiquette, 18th Edition -

Failing to respond to an invitation is still considered a major breach of social contract. The Bottom Line

Remember that tone is often lost in text. When in doubt, keep it professional and avoid "Reply All" unless necessary. Emily Post's Etiquette, 18th Edition

Snubbing someone in person for your phone is the ultimate faux pas. Keep devices off the table during meals. Failing to respond to an invitation is still

Sound travels. Be mindful of speakerphones and strong-smelling lunches in open-office environments. 4. Social Grace in a Diverse World Emily Post's Etiquette, 18th Edition