Use Pareto thinking to pick channels, ideas and customers. Cut the long tail and double down on what works.

This book helped me cut waste in everything,clients, tasks, tools. It’s brutal in a good way.
It’s a timeless guide to focus and leverage.
For anyone looking to achieve more by doing less, by identifying and focusing on the 20% of efforts that produce 80% of the results in their personal and professional lives. It's a foundational read for optimizing productivity and impact.
A few inputs drive the majority of results.
Identify your top 20% and double down.
Don’t just optimise,eliminate.
Richard Koch
1997
The 80/20 Principle reveals a simple yet powerful truth: a minority of inputs often produces the majority of results. Richard Koch explores how understanding and applying this principle can transform personal lives, businesses, and societal systems. Also known as the Pareto Principle, the idea is that approximately 80% of outcomes come from 20% of causes. Koch provides actionable strategies for leveraging this imbalance to achieve more with less effort, offering practical examples from business, economics, and everyday life.
Koch begins by tracing the origins of the 80/20 Principle to Italian economist Vilfredo Pareto, who observed that 80% of Italy’s wealth was owned by 20% of the population. This pattern of imbalance is not confined to economics; it can be found in nature, business, and personal productivity. Koch argues that understanding this principle enables individuals to identify where their time, energy, and resources will have the most significant impact.
The principle challenges the assumption of equality between cause and effect. Koch emphasises that focusing on the vital few the 20% of inputs responsible for the majority of outcomes leads to significant improvements in efficiency. For example, businesses often find that 80% of profits come from 20% of customers or products. Similarly, in personal life, a small number of activities contribute disproportionately to happiness and success.
Businesses that embrace the 80/20 Principle can achieve remarkable results by prioritising high-impact activities. Koch identifies key areas where the principle applies, such as:
Koch emphasises simplicity, advocating for reducing complexity in processes and focusing on what truly matters. For example, instead of diversifying product lines excessively, companies should refine their best-selling products. He cites real-world examples of businesses that achieved extraordinary success by concentrating on their most profitable offerings.
The principle extends beyond business to personal productivity. Koch suggests analysing tasks to identify the 20% that yield 80% of results. By eliminating low-value activities, individuals can free up time and energy for what truly matters. This approach leads to better work-life balance and higher satisfaction.
Koch advocates for the concept of “time revolution,” where individuals allocate their most productive hours to high-impact activities. He encourages a mindset shift: instead of trying to do everything, focus on the few things that create the most value. This is not about working harder but about working smarter.
Koch applies the principle to personal happiness, arguing that a small number of relationships, activities, or experiences contribute disproportionately to joy. By identifying and investing in these areas, individuals can significantly enhance their quality of life.
The principle’s applications extend to society, where systems and organisations can be redesigned to maximise efficiency. Koch envisions a future where the principle guides public policy, education, and resource allocation to create a fairer, more effective world.
Koch discusses the increasing relevance of the principle in modern networks and digital systems. In today’s interconnected world, 80% of influence or value often comes from 20% of participants. He highlights how technology magnifies the effects of this imbalance.

Greg McKweon
Rules for choosing fewer, better projects. Protect time, set trade offs and align efforts with clear goals and measures.

Gary Keller
A method for ruthless focus. Ask the focusing question, block time and protect momentum on the work that matters most.
Focus effort on the 20% of activities that drive 80% of results, systematically eliminating low-yield work to maximise output per hour invested.
Identify and leverage limitations as forcing functions that drive creative problem-solving and strategic focus.
Systematically rank projects and opportunities using objective frameworks, ensuring scarce resources flow to highest-impact work.