Self-rated flashcards for pattern definitions and when to use them. Spaced repetition for the recall you need cold.
Front: the pattern. Back: what it is, when it applies, and the tell that should make you reach for it. You rate your own recall, and that rating drives when the card comes back. Cards are drawn with spaced repetition, so the ones you miss come back sooner and the ones you know back off. Progress is kept in your browser.