Use it or lose it! Write down the phrase, and work it into as many scenarios as you can. Write it into your own example sentences. Use it every opportunity you get.
Watch Japanese TV and Movies (Anime, variety shows etc.) many of the words and phrases I know best are ones that are repeatedly spoken by Japanese people ( usually to conveying something funny cause i like to joke around) it’s all about familiarization, especially when it comes to phrases since Japanese has so many.