Answer:
Mexico
When meeting others, women should initiate handshakes with men, but all people should avoid making too much eye contact; that can be seen as aggressive and belligerent behavior. If sharing a meal with others, keep your elbows off the table and try to avoid burping at all costs. Keep your hands off your hips, and make sure you never make the “okay” sign with your hand: it’s vulgar.
Japan
When dealing with Japanese clients, be sure to dress fairly conservatively, and make sure that you bow lower than they do upon meeting them. Accept gifts with both hands (and open them later, not in front of the giver), and never blow your nose at the dining table. Avoid asking and answering direct questions: it’s better to imply rather than ask, and to answer with vagueness during conversations.
Germany
Much like Scandinavian people, Germans tend to be reserved and polite. Ensure that handshakes are firm, and always address people with Mr. or Mrs. followed by their surname (“Herr” or “Frau” if you’re confident that you’ll pronounce them well). Decent table manners are of great importance, and be sure to say “please” and “thank you” often.