Tip:
Color and the human eye.

The issue:
You want to draw attention to lyrics, bible verses, etc. on the screens and have them legible but not gaudy.

Solution One
Use light colored text on a dark colored background. This shows up best in rooms with a lot of ambient light streaming through the windows. Use color combinations that are complementary, such as yellow text on purple or yellow text on brown. These are usually found as opposites on the color wheel. If you use a textured background, make sure the pattern is not too "busy". Put a drop shadow behind the text to make it "pop".

Solution Two
Use the "Flush left" justification for your text (see above). Studies have shown it is much easier for the human eye to move to the next line if the lines begin consistently in one place, instead of jumping around trying to find where the next line begins, as when text is centered horizontally.

Solution Three
Use a legible font. Script fonts are the worst. Serif fonts, such as Times New Roman are easier for large blocks of text, while sans serif fonts such as Arial are good for titling.

Whatever you do, don't do this:

This is an example of a bad color combination, poor font choice, and horizontally centered text which forces the eye to jump to a different spot on each line.