I am surprised this hasn't been submitted dozens of times in the past.

For those who don't know -- and I guess there are always new people -- this is probably the most famous Rails tutorial on the web.

It has the following impressive attributes:

1. Free

2. Goes through a good process

a. Backs up code to Git

b. Tests the code

c. Deploys it to Heroku

Other paid tutorials are often versions of this one.