You might recognize ながら (nagara) as an ending that can be attached to a verb stem. verb stem + ながら, followed by another verb, is used to show that two actions are performed at the same time. A great example is:
音楽を聞きながら日本語を勉強します。
おんがくをききながら にほんごをべんきょうします。
I listen to music while studying Japanese.
Not only is this an important part of Japanese grammar, it's also a good approach for anyone wanting to push their Japanese to the next level. If you can increase the times when you're engaging with Japanese -- outside of the classroom -- it will help improve your listening skills, vocabulary retention and can help learn and retain grammar forms as well.
Are you exercising? Commuting? Cleaning? Get in the habit of listening to some J-Pop while doing these things. When you find a song you like, stop and look up the lyrics.
運動しながら日本語の歌を聞きます！
うんどうしながら にほんごのうたをききます！
Do you watch Japanese anime, movies, or TV shows? If you usually watch in English or with English subtitles, pick an episode you've already seen, and watch it in Japanese, no subtitles! Don't stop at every unknown word (ok, maybe looking up a few is ok). Put on a TV show while you're doing the dishes. 皿を洗いながら日本語のテレビを見ます！
さらをあらいながらにほんごのてれびをみます！
These are some examples of how you can make Nagara Nihongo a habit. Try it, and let me know how it goes!