I was looking for some easy resources for a friend who just got a young and very excitable rescue dog. And I remembered how much this article helped me when I was preparing to train my new dog. It is very short and to the point but mentions all the important criteria for successful recall training. And I remember that the '$100 bet' and hamburger hidden in the tree were real eye openers for me at the time.
The First Steps to Teaching a Reliable Recall: Kathy Sdao - Bright Spot Dog Training
Banjo's recall is pretty solid! It only doesn't pass the cat chasing test. Yet.