Air your grievances privately. Constant negativity or speaking poorly about others in public not only makes you appear bitter—it erodes trust. Slurping, chewing with your mouth open, or ignoring basic dining etiquette sends the message that you’re unaware of social norms. Good manners at the table show self-awareness and respect. Failing to say “please,” “thank you,” or “excuse me” might seem minor, but it leaves a lasting negative impression. Courtesy costs nothing but speaks volumes.