I have known this for years and I constantly wrestle with the fact that in so many of our learning places we haven't cracked it! I was reading about the 80:20 rule and it made me think about how we might simplify and focus what we are doing to achieve brilliant outcomes.
The 80/20 Rule means that in anything a few (20 percent) are vital and many(80 percent) are trivial. In Pareto's case it meant 20 percent of the people owned 80 percent of the wealth. In Juran's work he identified 20 percent of the defects causing 80 percent of the problems. Project Managers know that 20 percent of the work (the first 10 percent and the last 10 percent) consume 80 percent of your time and resources. You can apply the 80/20 Rule to almost anything, from the science of management to the physical world.