
They're taped to my wall right by my monitor so I can flip them up and see the song (written lightly in pencil so I can't read it before I flip) on the back. I haven't gotten around to making many, as you can see, but I'll probably finish it up this summer. I have many riffs notated already on scratch paper in my binder; I just haven't taken the time to cut out little flash cards.
Find your own notation style, of course, but keep it simple. Look up every once in a while and see if you can name all your riffs. You don't have to know every riff from a song--you just have to be able to recognize the song at some point while you're dancing to it.
(By the way, that's Cottontail, Tiger Rag, Jeep Jockey Jump, One O'Clock Jump, Rockin' in Rhythm, and Jeep is Jumpin'.)