Short and simple iterations, every day.
The solution I was looking for, since a few days: “Instead of making Pharaonic type “change management” plans, you should start by implementing small ones every day. These “quick wins” will serve as guidelines and show you the path towards the new and improved culture you are seeking to build. As Agile methodologies have taught us, having short and simple iterations is the most productive way to move forward.” – Full article here
Sometimes the answer is in the basics. Thanks Ziobrando.