How about just listening to your "direct reports" (vomit), and having that inform your "leadership"? Stop being a robot which is how this guide makes it sound. Be human. You'll get so much more out of people than by aping some management how-to.
Some of the worst managers I have had have been hired or promoted into the role, whereas the better ones were pushed toward that by the people that they would soon lead. The world is being taken over by bad managers, don't be one of them. Listen first.
Edit: The individual writing this guide appears to have only had barely two years in a hard 'management' role, according to their LinkedIn. How can they possibly be qualified to give advice on a subject that takes years and years and years of developing and refining soft skills, let alone consulting on the particulars of leading people in that time? Might as well run for President. What arrogance thinking they can go into an organization and infect it with the Tech-leadership-style-du-jour and think they've done some good.