What is the biggest mistake I see church leaders making in invitation?

The ability to set realistic, yet a challenging vision of invitation. A second mistake that I see many church leaders make is paying way too  much attention to the variables that are not within their control. It is really important to have a clear understanding of what is with-in. and what is outside of one’s control. Once this is established, the mentally tough  church Leader becomes absorbed in developing, with excellence, each variable that is within his/her control.