Ultraproductive: The 90-Minute Method to Optimize Focus, Sleep, and Stress

The simple and proven method for more focus, better sleep, and less stress

Thriving in today’s overstimulated world has never been harder. We treat ourselves like machines—constantly ”on,” multitasking, and never truly unplugging. But this relentless hustle is backfiring: our current idea of productivity is actually making us less effective and more exhausted.

But what if the secret to multiplying your productivity by up to 10x lies not in doing more, but in simply doing three things differently?

In Ultraproductive, authors Eric Partaker and Dr. Christian Poensgen reveal the transformative power of the 90-minute method—a simple, science-backed approach that addresses three key aspects of productivity and well-being:

-       Focus: Dedicate just 90 minutes a day to deep, uninterrupted work and watch your productivity double—without working more.

-       Sleep: Prioritize 90 minutes of deep and REM sleep nightly to supercharge your brain and increase output by up to 2.5 times—without sleeping longer.

-       Stress: Break stress cycles every 90 minutes to maintain energy and sustainably double your effectiveness—without burning out.

Drawing from cutting-edge research and their combined expertise in neuroscience, psychology, and business, Partaker and Dr. Poensgen present an easy-to-understand framework for becoming ultraproductive—not just surviving, but truly thriving at work and at home.

Packed with actionable strategies, relatable examples, and fresh insights, Ultraproductive is the essential guide for anyone seeking focus and fulfillment in an increasingly hectic world.

Eric Partaker is a CEO coach and thought leader in the fields of business, leadership, and peak performance. He’s known for helping CEOs, founders, and entrepreneurs scale their companies and become world-class leaders. Partaker has advised Fortune 50 CEOs while at McKinsey & Company, helped build Skype’s multibillion-dollar success story, founded several companies, and helped scale more than six hundred businesses. In 2019, he was named CEO of the Year at the Business Excellence Forum. His work has been featured in The Wall Street Journal and The Economist, and on several major TV networks. Learn more at www.ericpartaker.com.


Dr. Christian Poensgen is a scientist turned entrepreneur, writer, and executive coach. He holds a PhD (summa cum laude) on the relationship between stress and performance and helps ambitious people perform at a high level without compromising their health or well-­being. Dr. Poensgen has worked as the senior fellow of the Future of Work think tank in the German federal parliament, as cofounder and director of the European Center for Digital Competitiveness by ESCP Business School, and as an agenda contributor at the World Economic Forum.