LOL. Some of my ways of study:
-Get next years grammar book and start studying
a) Make vocab lists
b) Read stories and grammar points
-Kodomo Charenji (Challenge)
a) Vocab and grammar lists
b) You might need a japanese person to help
-Fansubbed movies and stuff. Check out d-addicts and jtv-fansubs.org iirc. its jtv fansubs, google it.
-Music : Urufuruzu is really good. Another one I like is HY and a little Cocco. And def tech. Try to understand the songs. Get the lyrics and give it your best shot. A Japanese person can explain what you dont udnerstand.
-Friends. Cmon, its not that hard to get some japanese friends. They are studying abroad and dont know anybody. So if your friendly and willing, they will be too.
-Kanji. Get a jlpt list of kanji's and learn em. Make flashcards. This is taking a loooooooooong time for me.
Finally, the best of all, GET A JAPANESE GIRLFRIEND. Definately the most fun way of study. You can use japanese at your convienence, and at the same time have a girlfriend which is really fun if you have standards and a way to weed out the lemons. Just make sure you actually try to speak japanese. Trust me, she'll get enough chances to practice english, and practicing japanese together is also practicing english cause guesse what all the explination is done in? Thats right, english.
So theres some stuff. Take what you like, discard the rest.
Edit: Oh ya, i forgot bilingual books. Also magazines. Once you get your kanji knowledge up you can start to read more. But reference books do really well. Kodansha has a ton.