While much effort goes into the first couple words of a PSA, the entire script should be written in a way that keeps the audience listening.
Production
Write the script in all CAPS. This makes it easier for the announcer to read.
Make sure the script is written in at least 12-point font.
Leave a large margin on one side for the announcer to write notes on.
Once a PSA is written and produced, the organization should meet or call public service directors at local radio and television stations. (Including cable)