Read as much as you can before you come.
Both the US and Canadian Embassies have information on their websites also.

Contract: Make sure your contract spells out your salary, housing, medical insurance,
number of teaching hours, and airline
tickets.

Culture: I believe Korean food is for
too spicy and very limited when
compared with Western dishes. Western
food is limited and expensive.
Many Koreans outside Seoul do not chose
to or know how to speak English well.

Tips: Get a business card wherever you
go. Then simply give that to the taxi
driver when you want to go back.

Good Luck!

Mr. D