If you want to retain what you learn and become more proficient in Spanish, you will need to participate in class and practice outside of class. Below are some NATURAL and FUN ways to integrate Spanish into your daily lives.
Text your friends/family in Spanish (by speaking to improve your speaking).
Text your friends/family in Spanish (by typing to improve your writing).
Change the SIRI language on your iPhone or iPad to Spanish. Ask SIRI questions in Spanish.
Email friends/family in Spanish.
Speak to your friends/family in Spanish.
Go to Spanish speaking restaurants and interact with waiters in Spanish.
Watch Spanish speaking programs on Youtube, Netflix, Disney, or any other providers.
Find some good and appropriate Spanish songs and sing them until you know them by heart.
Read, watch, listen, learn from resources linked here.