*Make space! Always maintain enough distance between you and someone you're talking to, even a friend! Personal body space is very important to Americans!
*It It is NOT usually acceptable to call someone before 9am or after 10pm.
*Never ask for someone's personal information such as age or salary details. It is considered very rude!
*Don't cut ahead in a line. 'Cutters' are not tolerated!
*Yawning or sneezing without covering your mouth or burping are considered very gross! Americans have very high hygiene standards.
*Opinions: it's OK to have them!! This manner of direct speaking is often interpreted by foreigners as rude, but it isn't!
*Unexpected visits aren't really 'the done thing' in America! Telephone beforehand.
*Remember to knock before entering a room.
*Maintain eye contact when speaking to someone. Not looking someone in the eye can be taken as a sign of dishonesty.
*Always try to be on time. Punctuality is extremely important for Americans.
*Never forget to say 'please' and 'thank you'. Not doing so means that you have bad manners!
*Names: it's often OK for young people to call adults by their first names. It is not considered impolite or disrespectful. Rather, it is taken as a sign of equality, a highly valued American ideal!
*Eating before others are ready to begin, is considered very impolite.
*Remember to always tip waiters, doormen, taxi drivers, hairdressers. It's a highly important social convention in the USA!
*Switch off your mobile phone when at the movies or at a restaurant with others.