Be clear about what you want to change. Don't allow yourself to become distracted. Focus on the law, the policies, on what needs to get changed. Don't become involved in personal vendettas. Be hard on the problem and soft on the people.
Bureaucrats think the way they do because they are trained to make and follow rules and regulations.
It's part of who they are and how they think. Give them ways to think differently. Develop a strong support system. Talking things out with other like-minded people helps keep everyone focused. Analyze when things go awry and determine new tactics and directions.