https://www.linkedin.com/pulse/three-mistakes-scrum-masters-make-how-co…
Particularly these points:
On the Daily Scrum; "I do think the Scrum Master should participate in the daily scrum and should give an update. "
On the 6 x 2 + 1 cycle: "Introducing a cycle like this actually benefits more than just the team. The product owner now has a week without any “distractions” from the team. "