I think it would be a mistake to apply the Pareto principle to time distribution as the author seems to want to do here: "so putting 20% into any one thing and

I think it would be a mistake to apply the Pareto principle to time distribution as the author seems to want to do here: "so putting 20% into any one thing and reaping 80% of the benefits is a very time-maximizing way to live." The Pareto principle is really about the distribution of causes and effect and factors. The goal would seem to be to isolate and identify your vital factors and focus most of your energy on those to maximize your output.