Hi Kevin,
I haven’t read the material that you have recommended but what I’ve read that introduced me to the 80/20 which I start to apply since is Tim Ferris “4 Hours Work Week” and also from my mentors at work who have achieve top levels and I hope to follow their successes in the near future.
What tricky about this rule is you have to be able to identify the 20% that will yield the 80% result that you would like to see. So knowing your strength is one but also understanding all the project parts that contribute to that 80/20 to me was challenging at first but now I use this rule religiously at work and home. It’s a time saver for me to concentrate on other tasks at hands that I usually make up excuses of not completing them.
Cheers.