The Co-Founder Behind Slack Shares What He Did 140 Times Last Year Alone — and How It Helped Prevent Burnout Posted by June 7, 2018 Leave a comment on The Co-Founder Behind Slack Shares What He Did 140 Times Last Year Alone — and How It Helped Prevent Burnout Slack’s co-founder and CTO Cal Henderson explains how to make sure you’re not overwhelmed so you can accomplish your biggest goals.