Ultra-Productive: The 90-Minute Method to Optimize Focus, Sleep, and Stress
Christian Punskin and Eric Partaker · 2020
Where it's mentioned
Focus, Sleep, and Stress: The 90-Minute Method Behind Better Work with Christian Poensgen
Beyond the To-Do List - Productivity for Work and Life · Oct 2026 · 1:23
“they have a new book called ultra productive the ninety minute method to optimize focus sleep and stress ”
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