This is basically the same deal as the Restful Authentication post below. I've used RSpec in the past (these quick start-up guides are not for beginners), I just need somewhere to quickly reference the beginning commands/code snippets to start my Rails applications.
Here it goes!
Installing RSpec and RSpec for Rails
sudo gem install rspec sudo gem install rspec-rails
Generate RSpec subdirectory for tests
Use RSpec scaffolding tool instead of regular scaffold! This way, you get the basic tests for each new controller/model/view you are creating.
script/generate rspec_scaffold model_name ...
If you're looking to learn RSpec, The RSpec Book is an excellent reference.