Listen to lots of music in the language.
you are kidding right? when learning English music was the hardest thing to learn to understand, and even now after many years it's still difficult to pick up words in a lot of cases. Why do you think they have all those 'misheard lyrics' websites?
I would like to see somebody learning English by listening to Elton John songs
"Card readers? We don't need no stinking card readers." -- Peter da Silva (at the National Academy of Sciencies, 1965, in a particularly vivid fantasy)