I'm studying for level 3 too, since I feel that level 4 would be too easy. It's like I'm in between. I'll probably end up taking it in Georgetown, since it's closest to me, but I still haven't registered yet. Yesterday, I studied my level 3 grammar and Kanji for four hours straight. I plan on doing the same again today up until December. I'm going to be dreaming Japanese at the rate I'm going. lol
Seems that from the practice test I took on the site, my weak point was definitely the vocabulary/writing section. I'm so-so with grammar, as I can usually figure out stuff based on the context, but it could be better. I still take too long, in my opinion, to answer.
The kanji in the level 4 test was semi-easy, but looking over the level 3 one, I need to study that more too, so I have level 3/4 Kanji flashcards. I even have a text filled with grammar rules and such expected to be on the level 3 test that I got off of Amazon.com.
Like it was already mentioned, it'd probably just help to look up old tests and practice with those. I should do that as well.
I just hope they have an answer key to make checking the answers much easier.
There were some resources mentioned in this thread...
http://www.japanforum.com/forum/livi...ency-test.html