How do you keep new words from fading away?

Hi everyone! I’m Ava. I’ve been studying for a few months now, and I’m having a little trouble. I learn new words every day, but by the next week, they seem to disappear! It’s like they just won't stick. What are your favorite ways to remember new vocabulary? Do you use flashcards or try to write stories? I would love to hear any simple tips you have!