The 80-20 rule, also known as the Pareto Principle, is a familiar saying that asserts that 80% of outcomes (or outputs) result from 20% of all causes (or inputs) for any given event. In business, a goal of the 80-20 rule is to identify inputs that are potentially the most productive and make them the priority.
The 80 20 rule is one of the most helpful concepts for life and time management. Also known as the Pareto Principle, this rule suggests that 20 percent of your activities will account for 80 percent of your results. This being the case, you should change the way you set goals forever.