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The McKinsey Mind: Solve Big Problems on Day One (Ethan M. Rasiel, Paul N. Friga)
When facing a high-stakes business challenge, most people boil the ocean—gathering endless data, opening dozens of tabs, and generating zero clear answers. Elite consultants at McKinsey do the exact opposite. In The McKinsey Mind, former consultants Ethan Rasiel and Paul Friga reveal the Day-One Hypothesis. Instead of starting with open-ended research, you force yourself to propose a root cause and solution within your first hours on a project. Framing a single, bold hunch acts as an analytical filter, allowing you to discard 95% of irrelevant data before you even begin analyzing. Paired with the MECE (Mutually Exclusive, Collectively Exhaustive) framework, you don't hunt for endless clues; you simply test the specific facts needed to prove your hunch wrong. This approach turns problem-solving from an exhausting research marathon into targeted, rapid execution. Ready to tackle high-stakes decisions without the overwhelm? Open the Momentum app to build your own Day-One Hypothesis tree with our interactive exercise, and read Ethan Rasiel and Paul Friga's full book, The McKinsey Mind, for the complete strategic toolkit. 👉 Practice the best leadership ideas every day with the LeadRight app