Now I realise I'm in a privileged position, being a girlie, and that strictly speaking I'm not supposed to lead and therefore don't need to remember moves as such (this is a useful get-out-of-trouble clause when my partner berates me for missing his leads!!) but I have a suggestion for retaining moves just learned in a class.
It's really a general memory technique, but when doing the team cabaret for Hammersmith last year I found it a really good way to learn the routine (so good that I can still run through most of it in my head almost a year later). Rather than writing it down, the trick is to repeat the move as soon as possible after you learn it (so maybe in freestyle after the class) then over in your head BEFORE you go to sleep on it that night and then again the following morning, and again a day or two later and again a week or so later. Sounds like a lot of work, but I found it to be effective...
Or if you have a video camera, film yourself doing the routine before you go to bed and it will be there to refer to forever more... But that's probably cheating
