[pasbesoin]

Find some music you like that has contemporary lyrics in that language, and listen to it a lot.

"Tune your ears".

In addition to working to pick up the semantics of the lyrics, different languages emphasize different frequency ranges and sounds. You do need to literally "tune" your hearing to better perceive these.

Music you like turns this from a chore to a pleasure. Also, with music, video, books, etc., you start to pick up some of the culture, which helps you to become more "native" in your approach. There's also a lot of "slang" and contemporary word usage and dialog that will not make it into a text book.