The JLPT approaches!

The JLPT is on the 4th! I'm scrambling; one never knows quite what to study, and experience tells me that uncertainty on even one element in an item can lose you the point. I've ordered a book of N3 test questions that promises to arrive Tuesday, and I'm trying to find 完全マスター; in the meantime, I'm reviewing kanji flashcards and a site that claims to know which kanji to focus on. (I'd link to Kanzen, but weirdly I can't find the edition I have.) I'm consistently at the head of the diamond league in Duolingo, but I don't think that really is preparing me for anything but ordering battleship sushi. I'll need #2 pencils and an analog watch. It's like the ascending part of a rollercoaster.