Many of the correct behaviors people once considered common sense have gotten lost in the swirling wind of bad advice, outdated manners, rules, and social media that makes it too easy to slip up and be rude. 
There are certain accepted behaviors in all social situations that you need...

• Conversation. Learn how to hold a decent conversation with back-and-forth dialogue. Never monopolize a discussion.
• Never gossip. 
• People’s names. Most people appreciate your effort to learn their names if you spend more than a minute or two talking with t...

• Have good manners.
• Be on time.
• Personal space. Every culture has different comfort levels of personal space, so before you travel, find out how close you can get to people without being rude.
• Men’s manners. Be a gentleman. Rudeness is never...

• Business relationships. Limit personal conversations at the office on a need-to-know basis. Be a good team player, don't make annoying sounds that might distract others, and offer to assist coworkers if they need help.
• Proper attire. Know how to dress in any situation.