That's what I am trying to figure out for Spanish!! :) From what people have told me, you learn the same way you learned your native language. This is the way a baby learns. First, you listen to others speaking the language for a long time. Second, you try to imitate the way they talk, even though you are wrong most of the time, and you try to talk a lot on a regular basis. Third, you refine your grammar through formal education. If I had some secret formula, I'd tell you. I know my Spanish is way too slow and incorrect, but I also know with more practice and listening I will get faster and more accurate.