Some things I learned at RubyEnRails 2007
rSpec can create nice documentation by looking at the example/test.
With rSpec you can define empty tests that show up as todo’s in reports.
Netbeans has really nice Ruby support, including method completion for all classes.
:to_yaml is handier for debugging than :inspect.
Anything in a ruby script after END is available in the DATA Constant.
The membership administration for the dutch user group of another programming language runs on Rails.
Fakeweb is a nice gem for faking web requests.
:balanced_asset_url can speed up your page loads.