Among the thousands of languages there are, there is one that interests you the most. The one that grabs your attention. If you have started learning the language already, you may have a certain amount of knowledge of that language. The language that you will be learning also comes with a culture/place attatched. You should learn more and look into who, when, where they use the language. You should by now start immersing yourself into the language. In order to get exposed to things that are related to that language and also to learn the language faster and even the culture.
There is a lot of content in the internet, where you can get acess to music from that language. Just look for the artists in your favorite genres. You can learn new words or phrases from that language.You might find your favorite artist!
Art: Keep yourself intrested in the language by looking at art or related things. Do not give up because learning the language has become hard! Keep at it and entertain yourself in that language that you desire to learn.
Reading: Practice your reading and writing. If you have a book, you can do the language exercises and learn more about the language.
Videos: When seeing videos, include the subtitle in english to learn the language. Make sure you see the video again if you do not understand.
Vocabulary: Make sure you are learning vocabulary in order to expand in your speaking of the language.