Welcome to the 237th episode of the Inc. Uncensored podcast, hosted by Inc.'s editor in chief, James Ledbetter.

First, research director Marli Guzzetta discusses the do's and don't's for any company that wants to make the annual Inc. 5000 list of fastest-growing private companies in America. Her rundown includes a rare peek behind the curtain of the list's vetting process, and should be useful for entrepreneurs everywhere.

Next, San Francisco bureau chief Matt Haber delves into the topic of mass shootings, a "problem from hell" that's increasingly affecting offices across the U.S. One startup trying to address the problem: Openpath, a 3-year-old startup based in Los Angeles that can automatically lock down or fully unlock your office via a smartphone app. It's a potentially useful tool for large corporations and tiny startups alike--and free for nonprofits, schools, and places of worship.

Finally, I talk about one startup's secret to great culture: playing Fortnite at work. Lehi, Utah-based enterprise software company Podium already has more than 650 employees and, according to its CEO, a $1 billion valuation. Such fast growth is often challenging but video games have helped new employees quickly adapt to Podium's culture and become more comfortable interacting with senior leadership.

Check out the full episode in the player below, in iTunes, or wherever you get your podcasts.