Lisa Scott 2400
Watching movies in English is a great way to practice. If you own or have rented the movie, I suggest that you watch the same movie several times. The first time, watch it with subtitles. The second time, turn the subtitles off as much as you can but turn them back on when you get confused. Keep watching the movie, keeping the subtitles off more and more until you can get all the way through without them. This works best if you start with a short movie or TV show.
i agree with lisa and i would like to add that watching tv-series that you've already watched in your mother tongue can always be a good start. episodes are much shorter than a full movie thus they are not so time-consuming and with your background knowledge of the situations and characters, you'll have more success and understand more in the beginning than with an unknown film.