LPT: If you have a business, make sure people who only listen to TV can understand your advertisements.
Have someone who is unfamiliar with your business listen to your ads. Not watch -- listen only. If they can't understand it, you're going to waste a lot of your advertising dollars.
There is a frequent ad for a local business in my area that I hear as "Call bah-de-bah-bah, bah-de-bah, OOO!"