How to 80/20 Your Life
The 80/20 rule (also known as The Pareto Principle) is a great mental model to refocus your priorities.
The rule can be simplified to:
80% of the output or results will come from 20% of the input or action. The little things are the ones that account for the majority of the results.
Every time I sit down to think and ask the 80/20 question ("Do 20% of... [verb] 80% of...?") I make new discoveries and learn where to shift my focus, time, and perception.