The story behind Slack—the communication platform used by millions around the globe—is almost a happy accident. Cal Henderson and his co-founders had been toiling away on a gaming startup, Glitch, when they realized the product of most value within their organization were the tools they'd hacked together to collaborate across locations. That collaboration tool spun off into Slack, which IPOed in 2019 and now has a market cap of over $16 billion. Slack has become more vital than ever in 2020, standing in as our "digital office." Cal shares how to scale an engineering organization, why the role of the office is forever changed, and how to master personal time management.