Trust is the foundation of real teamwork. - Patrick Lencioni

The only way for people to embrace a message is to hear it over a period of time, in a variety of different situations, and preferably from different people. That's why great leaders see themselves as Chief Reminding Officers as much as anything else. Their top two priorities are to set the direction of the organization and then to ensure that people are reminded of it on a regular basis.

there cannot be alignment deeper in the organization, even when employees want to cooperate, if the leaders at the top aren't in lockstep with one another

The most well-intentioned, well-designed departmental communication program will not tear down silos unless the people who created those silos want them torn down.