I manage people and it's rare that everyone will agree. However, I always apply the following:
I always try to allow people to 'save-face.' Meaning I praise in public and discipline (disagree) in private.
I always try to tie everything to my company's vision and mission. After all, they set the stage for how we should work, as well as the direction and results we need.
When I do not agree with someone, I listen and state their concerns/opinions back to them so they know I understand where they are coming from.
Lastly, when all is say and done and I still disagree, I ask the person to simply understand where I am coming from and ask they operate as a team player because I really need their contribution. If that does not work, then I may decide to take disciplinary action.
In the end, I know I've done everything I could to show that I respect and care about others' opinions. At the same time, my staff understands as the manager I am often asked to make decision and while I always seek input, my final decision is it and they must fall in line.
Kim
Self Improvement and Motivation