You learn according to the scientifically recognized spaced repetition system by Sebastian Leitner. You start with all the flashcards in the 1st compartment of the learning box. Correctly answered questions move forward to the next compartment, incorrectly answered questions move back to the 1st.
The flashcards in the 1st compartment are reviewed each round, the flashcards in the 2nd compartment every 2nd round, the flashcards in the 3rd compartment every 3rd round and so on. Once all flashcards are in compartment no. 5, this means that you really master your subject matter. Successful exams guaranteed!
Why don't you register for a free BASIC account, choose a set of public flashcards in the library and just give it a try.