The first is very practical. We never know what is going to happen and may need to be out due to illness, emergency, or just because we need a break. Therefore we need to make sure that we have leadership in place that can fill in and would know what to do. This leadership could be youth or students but you need to make sure you are investing in others who you can entrust with your ministry for a time if need be. Just as Jesus did with His disciples. He knew He had to invest in them because He would be leaving them and they would have to carry on His work. So He trained them and empowered them to do just that and we must do the same in our ministries.
This brings me to my second point. I firmly believe that if we are doing our job effectively, at some point the students and our leaders should not need us anymore. I know that is a scary thought. We all can feel our job security slipping out of our hands. But I do not mean this to be a threat to our job security but instead a gauge for how well we are doing our jobs. If we are effectively ministering our leaders should feel confident enough that they could take the reigns of the ministry if called upon. They also would have been trained effectively enough that they could and should be in a sense, student pastors. Our students are the same way. If we are doing our jobs effectively they should be able to go out and be the student pastors for their campuses. And if we have effectively communicated our vision to them and ensured they were discipled, they should not miss a beat and know exactly what to do in order to keep the ministry rolling.
Now, I want you to know that God has specifically called you to where you are for a reason and you will have a role to play as long as He leaves you there, regardless of whether your leadership and students "need" you. But in effort to gauge the health of your ministry, I want you to take a moment to evaluate your ministry. What would happen if you were not there? Who would step up? What sort of ministry is being carried out beyond the walls of your church? Wrestle with these questions. Pray over them. Answer them honestly. And then make adjustments accordingly based on what God reveals to you through this process.