Former student Jordan-san was kind enough to send us some of the websites he uses to learn Japanese, so here they are for you too!

sci.lang.japan Frequently Asked Questions
Tae Kim's guide to learning Japanese
Japanese particles on Wikipedia
Videogame vocabulary
Tofugu’s Japanese Language Resources Guide
Tofugu’s 100 Best Resources For Learning Japanese

Tools
The Ultra Handy Japanese Verb Conjugator
japaneseclass.jp

Random:
Anime Transcripts
AJATT Silverspoon
Japanese Level Up