Anki is awesome. I heard about it a week or so ago here, and have gotten though the JLPT 2 words (1300 of 'em) with 90% retention in about a week. I really wish I used flashcards when I was living in Japan, instead of my lazy-ass "i'll learn it from hearing other people" technique. (That worked, but not nearly as well as Anki.)
Now I just need to find a JLPT 1 word list :)