One of the blessings of being a Ruby developer is the generosity of the community around it. There’s just an overwhelmingly a lot of excellent resources out there. I will attempt to curate the ones that have been useful for me.
Confreaks is a repository of talks from various conferences around the world - mainly Ruby and Rails related - but not limited to.
Gregory explained proper place of mock objects. When done correctly, mock objects will help in architecting a well designed Object Oriented application. Main takeaway for me is use mock object to test messages between objects but not object states. You might want to watch this more than once, it is definitely worth the effort and time.