LordEmbok

I'm using 
http://www.alljapaneseallthetime.com/blog/all-japanese-all-the-time-ajatt-how-to-learn-japanese-on-your-own-having-fun-and-to-fluency and it's working fantastically.
 
Note that you don't need to follow his ideas to the letter - I certainly don't do everything in Japanese, but playing a chapter of SRW a day in combination with his studying technique is more than enough to get me learning quickly.
 
Also note that Hiragana and Katakana should be learned in less than a day each, at the very most a week total. If you're going slower than that it's a sign that you'll probably struggle and possibly quit alltogether as things get more difficult.