A startup is not a smaller version of a big company — it's an organization built to search for a new, repeatable business, and it needs its own set of tools.

• Old-style management, built for known, steady businesses, doesn't work well under the huge uncertainty a new startup faces.
• A startup's real product is not just what it sells, but proven knowledge about what customers actually want.
• Progress should be measured by what you've validated and learned, not just by what you've built.
• Even one person working alone can be a "startup" if they're searching for a new way to create value under uncertainty.