Learn in chunks: Instead of trying to learn all 75 cards at once, try learning five cards per week. When you have learned all the animals' names, repeat this process to learn the bonus phrases.
Challenge yourself: If you like a challenge, try timing yourself when you review with the flashcards and then try to beat your best time.
Learn in several ways: In addition to quizzing yourself with the flashcards, you can also learn by listening to the language, sounding the language out, writing the language down, and most importantly, using the language in everyday life.
Use spaced repetition: Learn one day and review the language the next day. Letting a day go by between learning and reviewing lets the language take root and grow.
Look for patterns in the bonus phrases: For example, what word-endings go on the names of the animals? What word-ending goes on the names of locations? Check out the Language Notes on your cards to check your understanding (Nisenan, Northern Sierra Miwok).