Below is a list of 'favorite Scrum mistakes', based on input from some great Scrum Trainers and Coaches.
Let me emphasize that I do not agree with all the items listed, although I do agree with almost all of them.
Hope they help you and your team.
favorite Scrum Mistakes V5.pdf
One can learn by thinking about mistakes. One sees positives by contrast with negatives.
But real success usually comes more from imagining success and going after it aggressively, rather than worrying about making a mistake. So, we hope you use this list with some common sense.