The best thing is always to speak with someone in English. But you can just listen to music, and pay attention to the lyrics, try to understand them each time you listen to a song in English. And then watch movies, and TV series in English - with subtitles if you cannot understand it, or without subtitles - one good way is also to watch a movie that you already know, without the subtitles.
I believe it's much more useful than listening to English tapes, and you'll have more fun ;)