Besides the usual poking around in irb or copying examples, what is the first application you wrote using Ruby?
My first was a generator for PHP test script code! Basically many of my Model classes resembly TableDataGateways, and the tests I run for each method look similar with minor tweaks for parameters, etc. I wrote a Ruby shell script which would list the files in my models directory, allow you to choose one, then ready in the classes in the choosen script and present a list of the methods. When you selected the method it would write the basic test case for that method.
I have since refactored (in part due the the recoginition that if I needed a program to write a bunch of repetative test cases, then I have other problems) to the point where it is no longer needed, but that was my first baby steps.
What were yours?