I've found it really helpful (with language study) to have big poster board on your wall that you write key terms on with a Sharpie.
This really works for me, but people think you're a psycho when they see it on your wall. (Think Billy Madison... "People to Kill")
But different mnemonics work for different people. I don't think there's any reason to believe that if you've had academic success thus far with standard studying, that suddenly you'll need flash cards for law. Or even that they would help.