Like you would do with your native language when you read, write, listen, or speak. The words you have memorized fall in place instinctively as you need them.
2. Watch Japanese Anime, Manga , Japanese news channel like NHK
3. Converse with your Japanese language course mates in Japanese.
4. At Sakuraa Nihongo Resource Centre, we have a library. We encourage our Japanese language course students to use this.
5. Use Japanese words in everyday situations. Make sentences in the context of say your job, interests etc.