To have influence make sure the influential people with the biggest mouths are on your side up front.
You have people in every organization who have the ear of the masses and can’t shut up (and they never will). Somehow, through sheer personality and guile, these people have some sway over the rest of the group.
Find these people!
Get them behind your idea by showing them how good they will look to others if they support your agenda. Let them become your “PA System” and work for you to spread the word. Having a lot of people believe in what you do before you actually do it, gives you a huge edge. It’s like discussing the details of a great buffet to a hungry audience 10 minutes before lunchtime. You pretty much had their attention before you started talking. Otherwise, the only change you will make will be changing your mind about the change.