It is ideal to divide your learning into smaller sections. Listen to the lesson several times, first only the vocabulary and then the contextual sentences. In the meantime, cut out the flashcards and try reading them several times. Make a pile of the cards so that they are all face up. Then take one at a time and translate either for yourself or aloud. Turn the card over to see if you have answered correctly. Set aside any cards where you have answered incorrectly.
Once you have mastered the words, move on to the practice sentences. Again, listen to the tracks several times, then prepare the sentence cards and follow the same procedure as you have in case of the vocabulary. Once you feel you know the sentences, mix the vocabulary cards and sentences together and go through them a few times. I recommend that you go through the whole group of cards in the morning and practice only the expressions you had trouble translating in the afternoon. This will make your preparation more efficient, as you will spend more time on those expressions that you find more difficult to remember.
Finally, take the written test that you will find in the scripts at the end of each lesson and check how successful you have been in the key. If you have mostly passed the lesson, move on to the next lesson.
Remember that our brains work by pushing unused expressions beyond short-term into long-term memory (partial forgetting) and discarding them altogether if they are not used at all (forgetting). It is therefore necessary to revive what has already been learned at regular intervals. Ideally, you should spend some time once a month repeating everything you have learned in the previous month. However, the way to the best memorisation is through active application in practice.