What do you use for flashcards? I used to use index cards - I'd even cut them up to make more - but I went through a lot...
Until I discovered Quizlet! I have started a Spanish Duolingo class (http://quizlet.com/class/791156/) and wanted to invite you to take a look at my sets. I am in level 11 and working through Adverbs right now; I make sets as I go. (While you're on Quizlet, check out http://quizlet.com/wazzie - a lot of sets by wazzie have helped me. She also has a Spanish Duolingo class.)
Of course, I'd love to hear your ideas, too!
Thanks for your work and generosity in sharing. As well as electronic flashcards, I still find the index cards handy, especially if I get a bit stuck [unable to practice for a few days on the computer]. The section 'Verbs Present 2', comes to mind.