I would suggest watching TV and movies in English. I find that that helps me with German listening skills. Hope that helps! :)

I think comprehensible input (and a lot of it). This means, listening to words and phrases that you already know. Reading words is different from hearing and understanding them. This is what most polyglots say and I think I agree. If you know enough words this may include watching TV or listening to the radio.

This can apply for any language. Look at movies, music, tv, or just videos of a person speaking the language you are learning.