In Greece, when they meet or greet people they shake hands with everyone – men, women, and even children at a business or social meeting. Shake hands again when leaving. And Good friends are most likely to embrace and kiss. Greeks are very Demonstrative and affectionate. In Greece, when nodding your head “yes” is not polite for them, just say “yes” instead. The O.K sign is a rude gesture, “thumbs up” means O.K.
Keeping eye contact with someone when communicating is perhaps one of the most important norms you will find within this culture. When doing business, make sure to always keep contact with someone, or you will be thought of as untrustworthy
A common belief is in "matiasma" or "the evil eye." Many times one is a victim of this because someone else is jealous of them. You might see someone wearing a special charm that protects them from this "curse," so try not to make anyone jealous or be jealous.
Punctuality is not particularly important in Greece, but foreigners are expected to be on time for business meetings, even though his/her Greek counterpart may be late. Greeks want to get to know you before they will do business with you. Business meetings will usually begin with general conversation before business is discussed. Trust is a major ingredient for acceptance and is much more important than qualifications, expertise or performance. Greeks and may be slow to trust foreigners. Greeks distrust written communications. Put everything down on paper and get the appropriate signatures. Letters/memos are often stiff and formal. Avoid telephoning unless it is impossible to meet.