In order to effect change, it is first necessary to overcome resistance.
Whether it is the resistance of an individual or a group, the key is to identify the source of the resistance and then address it accordingly.
Often, resistance is simply a matter of fear or insecurity; people are afraid of change, or they do not believe that they have the ability to effect change. In these cases, it is important to provide reassurance and build confidence.
In other cases, resistance may be more entrenched, such as when there is a vested interest in maintaining the status quo. In these situations, it may be necessary to use education and persuasion to slowly build support for change.
How you go about working to overcome the resistance can have a big impact on whether people decide to follow you.