Here are some helpful tips to keep in mind when you're visiting the US:

• Smoking is not commonplace and is subject to restrictions in most public places. All EO events are smoke-free.
• Americans tend to refrain from greetings that involve hugging and other close physical contact, except with family members and friends. For the most part, they are unreceptive to being touched during conversation and other social situations.
• The standard space between you and your conversation partner should be about two feet. Most US executives are uncomfortable standing at a closer distance.
• Direct eye contact conveys that you are sincere, although your eye contact should not be too intense. Certain ethnic groups may look away to show respect.
• To point, you may use the index finger, although it's impolite to point at another person.
• To beckon someone, wave either all the fingers or just the index finger in a scooping motion, with the palm facing up.
• To show approval, there are two common gestures: the “O.K.” sign, formed by making a circle with the thumb and index finger, and the “thumbs up” sign, formed by making a fist and pointing the thumb upward.
• The back-slap is sometimes used as a sign of friendship or camaraderie.
• To wave goodbye, move your entire hand, with the palm facing outward.
• When sitting, US citizens often look very relaxed. They may sometimes sit with the ankle of one leg on their knee or prop their feet up on chairs or desks. In formal business situations, however, you're advised to maintain good posture and a less casual pose. Crossing legs knee over knee is not considered arrogant. In the United States, this position is common and considered professional.
• When giving an item to another person, it's common to toss it or hand it over with only one hand.