I was gonna do a big Bruza post today ["get me!"] but I'm merely going to talk about how the Bruza-philosophy is a robust outline of the principles of Cognitive Behavioural psychology. "What You Waiting For" is, as the title suggestions, a self-help treatise on avoiding procrastination. Cognitive behavioural therapists would agree with his motivatinal message of "don't say you're gonna do it, do it and then say it's done", where decisive action is used to overcome the procrastination what usually accompanies a difficult task. Also, as Bruza says, if it's important for you to do something , it's worth reflecting that you don't want to end up "watching someone else doing what you want to be doing".
Those neat conceptual turn-arounds and word-plays, although they're simple, are executed with such glee and humour that it creates these lovely, tight rhymes.