In order to improve your listening skills, it is important to listen to English-speaking people as often as you possibly can. You may not always have a native speaker around, but fortunately, there are other ways to improve them.
Try to understand the gist of what is being said to improve your listening comprehension. You will gain more insight in the structure of the language and improve your command of the language during this process. You can watch TV, films and videos on YouTube.
If you like to read you can also try audio books. You can find some classics online; more recent titles are available at (online) libraries and bookshops.
Songs are also very helpful in improving your listening skills. They help to improve your vocabulary and grammar, especially when you sing along. Focus on the lyrics while you listen.
For more advanced practice, you can try TV shows, chat shows and radio programmes.