Review

A good part of each Pimsleur lesson is devoted to review.  In addition to reviewing the main points of the previous lesson, they often bring up a bit of language from an earlier lesson. ("Do you remember how to greet someone?")  Cleverly, they will do this when we're right in the thick of learning something new.  It takes the mind off of the subject at hand for a moment, so when we return to drilling I have to work harder to remember the just-learned forms.  I think it's very effective.  I'm given to understand that the review of older material follows the principles of spaced repetition, designed to strengthen long-term memory.

That said, I would like even more review of older material.  Some things I'm doing:

Quizlet flashcards.  The effort of making the flashcards is review in itself.  It's also learning because, since there is no text, I don't know how to spell anything.  I usually make flashcards after I've listened to a lesson at least 4 times.  I mostly make sentences, attempting to make variations on the forms presented in the lesson.  Sometimes I add a few new vocabulary words on my own.  For example, they taught "Would you like a little wine?" and "Would you like a little beer?"  I have added water, coffee, cream and sugar.

Audio flashcards.  I would like to review the main language points of each lesson without having to go through the whole 30 minutes.  So I excerpted many of the questions into individual audio snippets of 8-15 seconds in length.  I can put these into various playlists and play them in random order on my PC, tablet, or phone whenever I want to.  So far, it's adding up to about 5 minutes per lesson.

I may also use memrise because it also uses spaced repetition.  It sends email reminders to you when it's time to study and it brings up older material for review periodically.  I have used it a little with English learners, but haven't had a chance to try it myself (yet).