What is the recommended (mustahab) dress code for men and what would be an example of a dress code that someone in the West could emulate?

Additionally, could you advise me on what practical instructions can I implement to achieve exemplary conduct when interacting with people?

The dress should be a respected normal one, not like the one worn by odd people.
You should be polite when dealing with people.
Treat them as you like them to treat you.