By far the best tip we can give is to share your documents, flashcards and bundles in study related Facebook groups. The best time to post your study guides in these groups, is a week prior to exams. If you do this, there’s a great chance that the money will start to roll in.
Alexandra: "I write the study guides together with a girl in my class. We’re given so much literature to read, that it’s almost impossible to study and summarise everything on your own. We promote these notes on Facebook groups for our studies, and this way we are able to sell approximately 200 copies."