You can implement a spaced repetition system using physical or digital tools:
Physical Method: The Leitner Box
Use a series of boxes to organize flashcards. When you get a card right, move it to the next box (which you review less frequently). When you get a card wrong, move it back to the first box (which you review daily).
Digital Methods:
- Anki: A powerful, highly customizable digital flashcard application designed specifically for spaced repetition.
- Tinycards: A simplified, trialable approach to flashcards (e.g., via Duolingo's Tinycards).
- Mobile Apps: Use flashcard apps on your phone to make learning compatible with your daily life (e.g., during commutes).