The biggest mistake ist most common. I'm confronted with in 9 of 10 companies, organizations, business projects of all kind:
Here's the #1 Mistake of Change Management:
We (I) manage the change.
Not at all: Change is one part of THE evolution. Nobody ist able to manage THE evolution.
Yes, I know that you are honest and that you try hard. But look how efficient Change Management is. How expensive. How little you are rewarded.
You cannot directly manage change. But you'll be successful when you manage with change, with its conditions, with its laws and opportunities, with its wind in your sails.
And how to manage with change?
Don't worry. Just try out the 7 tools of change. The rest is success.