I've heard great things about http://railsforzombies.com/ and of course a good book, like http://pragprog.com/book/rails4/agile-web-development-with-r....
Going to have to disagree; railsforzombies is so thin on information, I don't really feel like it's worth the time. Then again, it takes only like 20-30 minutes. So go for it I guess.
I've found this to be an AWESOME resource:
http://openclassroom.stanford.edu/MainFolder/CoursePage.php?...
It's a full Stanford class of lecture videos. It really solidified my understanding of the concepts I learned from Hartl's tutorial.
I've been using RailsTutorial, and while it's packed with info, I feel like I would benefit from a more solid understanding of many of the basics.