Names and Titles
Use last names and appropriate titles until specifically invited by your Italian host or colleagues to use their first names.
Females almost always use their maiden name, especially in business and on legal documents. They generally use their married names or a combination of their married names and maiden names outside of business.
Body Language
Maintain eye contact while talking. Otherwise Italians might think you are hiding something.
To beckon a waiter or waitress raise your index finger and make eye contact.
Italians are known for using the most body language of all European nations.