If you want to improve listening, then practise listening.
- communicate with people (in person, online)
- podcasts (e.g. a free source of them is www.notesinspanish.com)
- music (check lyrics if you don't understand something)
- video (use subtitles if you don't understand something)
Always try to listen to materials that are more or less suitable for your level (it can be a bit above it), this way you'll keep your motivation . If with a basic level you try to watch a movie full of slangs, you will probably not understand it might be demotivating.
The most importnant is that you practise regularly and enjoy it!