Vilfredo Pareto was an Italian economist who unintentionally discovered an incredibly useful productivity and prioritisation tool. He recognised that 80% of Italy’s wealth was held by 20% of its population, and found that this 80-20 relationship (or similarly-weighted distribution, such as 70-30 or 90-10) also applied to many other aspects of life. For example: 80% of the output is produced by 20% of the input. 80% of the results are produced by 20% of the effort. 80% of the