Tried to learn a language when overseas teaching? Were you successful? Any tips or techniques or resources that you found useful in doing so?

If so please share them here with everyone, Thanks.

Conversational Mandarin after 1.5 years in China, nearly fluent in Japanese after a few years here.
The secret i think to learning another language is to immerse yourself in it. You really need to be living amongst it and speak it every opportunity that you get. Confidence is the main factor.