I agree with the prayer thing, but one important thing that I think a lot of people forget is repentance. Because you are leading service, you have to make sure you have YOU right. As musicians and praise leaders, we control the flow of the spirit of God. Anybody ever heard of "strange fire"? We can't just offer anything up to the Lord. Sometimes we feel as though just because the music sounded good and people were shouting that everything was annointed, forgetting that people are emotional and will move because of hype. The difference is that the annointing destroys the yoke.
That's at least what we try to do at my church.