There's the killer idea. The dynamic team. The seed round. Great founders today -- the ones who create high-growth, scalable businesses -- understand that these and other elements are indispensable in transforming a startup into today’s unicorn company.

But before any of that has an impact, there is one thing that every successful business must find: perfect product-market fit.

In "The Only Thing That Matters: Getting Your Startup to Product-Market Fit," we sit down with hall of fame-level entrepreneurs who discussing the insights that allowed them to achieve product-market fit.

Episode 2: Brian Spaly, founder of Trunk Club and Bonobos.

Key takeaways include:-Talk to prospective customers. Nothing replaces the value of in-depth market research-Don't underestimate the value of a niche. It may be your strongest market.-Go out and sell the product yourself. Sales are key to product-market fit.

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