I would like to learn new stuff, things that may make my music better (and worse).
Here is a quick one for you electric guitar players:
When playing in a small room with your amp, turn your amp towards you instead of towards the congregation. This will allow you to decrease your amp volume and allows your sound technicians to remove you from the monitor mix. If you have an open back on your amp, you will need to cover it using some type of board or very heavy material. If you have no way of covering the rear, I don’t suggest turning your amp around, since it will produce a strange tone quality directed at your congregation. Experiment and enjoy.