To actually help make meetings more productive, I highly recommend the book "The Surprising Science of Meetings: How You Can Lead Your Team to Peak Performance" [1] ("One of the top business books everybody will be reading in 2019" — Business Insider). For a quick summary, watch the author's webinar "The Surprising Science of Meetings: Evidence-Based Insights Leaders Need to Gain a Competitive Advantage" [2].

[1] https://www.amazon.com/dp/0190689218

[2] https://youtu.be/8rDuumUtfAM