When in the USA, do not:

• Address service people with disrespect or impoliteness
• Fail to use “please” and “thank you” when giving instructions to subordinates
• Do anything that might be misinterpreted as sexual harassment
• Boast about your accomplishments and achievements, salary, income or belongings
• Ask anyone’s income
• Cut in on a queue
• Stare
• Stand too close to someone you’re speaking with, lest you impose on their sense of personal space