Potential Head Football Coaches

Since this forum always has information about Head Football Jobs I wanted to get everyone's thoughts on what a Head Football Coach absolutely needs to be as successful as possible?   This could be for future Head Football coaches, current Head Football Coaches, and information for prospective employers.  I think that many schools are not equipped to ensure the success of the football program.  I thought some insight from coaches might help everyone better understand what is absolutely needed for a football program to have the ability to be as successful as possible.