I lived in Korea for a long time. I think the best way to learn is to surround yourself with many Korean things such as tv shows, music, etc. I never really studied it much but by living in Korea, I had to use it on a daily basis. I think I learned the most Korean from people who didn't speak any English since I was forced to use it in those situations. Taxi drivers were my biggest source of practice for me since many like to talk to their customers. I suggest you also study a course like the others have said. I think my korean grammar could be a lot better if I had did that previously.

I've been learning Korean for about 2 year.The first year,I studied in a Korean institute on every weekend(4 hours a week).The teachers are all Korean.And I made a lot of Korean friends in that period.Then I graduated from the college.My busy job gradually makes me away from the 아름다운 language.Recently,I feel so regretful to have given it up.So I began to learn it again with my teacher who taught me beforetime on every Sunday. The point is you should find more chance to practice with a native speaker and enjoy this language as YONG said^^. Once you get started,don't give up. 열공 한국어!ㅋㅋㅋ

I absolutely agree with Mr. Barry's answer. More often and intensively expose to korean-language enviroment, for example, intensive Korean course in Korea, more fastly and fluently master Korean... 즐공 한국어! Aroob (즐공 한국어 means "즐겁게 한국어 공부하세요. Enjoy leanrning Korean..."

Well I have been living here in Korea for 4 years now. However, I was so busy with work that I didn't get much of a chance to study Korean. These days though I am focusing more and more on learning Korean. I hope to join a university class, such as at Yonsei or Sogang, so that I can improve my Korean. My reading and writing is better than my speaking skill - as Korean isn't exactly a global language so you need to have a native or close to native level of pronunciation and intonation. Over the course of a month I studied a lot and (luckily) got to practice it with my Korean firends here. If you get a chance I would recommend trying to join an intensive Korean course here. There are a few seasonal intensive sessions that you can join.