I think I'll pass the JLPT

I did some self-testing for the JLPT test, since I bought a book with all the questions and answers from the 2007 test.
And you know what? I think I'll pass the test with a reasonable grade. I didn't do all the questions, and I noticed getting fewer right answers the further out in the test I got, but still of the about 25-30 questions I did, I got about 85-90% right, and I think that's pretty good.
I noticed the biggest issue I have is that my vocabulary is a bit small. The questions I got wrong was mostly because I didn't understand the question right, and just gambled on an option.
So I will just keep cramming my vocabulary until I can understand everything that happens in my test books^^,
がんばってよ^^,