There's a host of guided tutorials other than tryruby.org which are freely available and some have paid content available:
- Rails for Zombies - http://railsforzombies.org/
- Code Academy - http://www.codecademy.com/en/tracks/ruby
- Code School - https://www.codeschool.com/paths/ruby
- Treehouse - http://teamtreehouse.com/features/ruby