I’ve been studying Japanese for a few years and have made a few study aids to help me along. I’ve got tons of them, but it may take me a while to get them all online. I hope you find them helpful. Feel free to leave a comment and tell me what you think.
Hiragana, Katakana, Kanji
The key to learning Japanese is a quick mastery of hiragana, katakana, and kanji.
How to Study Kanji: Use the Kanji Proficiency Test Materials (written Aug 2001)
Vocabulary lists: For all levels of the Japanese Language Proficiency Test
These sites provide texts for reading practice.
There is a TV show called Nihongo Saijiki Daikirin （日本語歳時記・大希林）with Kirin Kiki and Satsuki Miki on NHK Educational TV on Saturdays from 12:20 to 12:30. It is a short and informative show that explains little points about Japanese. The way they explain it makes it easier to understand than if you were reading a textbook. However, as far as I know, there are no videos of this show available, so you have to catch it on TV whenever you can.