Since student leadership is really about discipleship, it's important to meet with your student leadership team regularly.
In my context, I meet with my student leadership team 4-6 times over the summer (plus an overnight leadership team retreat). Once the programming year begins in September, I meet with this team weekly for an hour. Although each team chooses the day and time for it's regular meetings, we've typically found it helpful to hold such meetings before or after one of our weekly youth ministry programs so as to save families a trip to and from the church.
At each of your student leadership team meetings, do a combination of things.
Always begin your meeting with prayer. This centers the team, focuses it on God, and helps differentiate it from other leadership groups teens might be a part of.
Next, do some kind of brief (10-20 minute) leadership training with your team. Gear this specifically to the teens on your team to make it relevant to where they currently are in their leadership journey. Feel free to integrate Scripture into this time. Some things you might want to address during these leadership moments include beginning and ending well as a leader, setting spiritual and leadership goals, and living like a Godly leader both inside and outside the walls of your church.