When it comes to the reading and listening sections of the JLPT, concentration is key. It’s not enough to be able to understand difficult texts and audio, you have to be able to do it for more than one hour long. Of course, you want to constantly improve your Japanese level, but don’t forget to improve your concentration too!
This is my review of the textbook So-matome Grammar N1. I loved studying with it, I don’t think that it is the perfect textbook, and I could point out many things that I didn’t like in it, but… for someone who learns Japanese as a hobby, it was pleasant and not overwhelming.