Of course, yesterday's advice about reading is also true for listening. When I was learning languages (French and German) at school, the only listening practice I got was when the teacher spoke or when she played short recordings on a tape recorder!
The current generation of language learners don't know how lucky they are! They have the Internet at their disposal, with access to millions of videos, podcasts, audiobooks etc. They have the chance to immerse themselves in the language for hours every day. Are you taking advantage of this?