[Arkhelist]

You could use flash cards and what not..
Games work too....
Also when you get your vocabulary up it helps to set your computer's local to Japan, you'll have no choice but to memorize the words with some programs. That helped me a lot.
I also collect SHOXX and Cure magazines (visual kei magazines) so I learned and memorized some vocabulary from those too.
Main thing is when you learn vocabulary you have to keep using it as much as possible. So chat with as many speakers as you can.