I suspect that the delivery is probably the problem for you, rather than the content. To me, the core of it reduces to:

* If you disengage your brain periodically (e.g., get enough sleep, have fun, etc) you will find you work better

* Occasionally one should look at their life on a macro-level, and evaluate their long term goals

I don't think many people would disagree with this advice, it is pretty common sensical.