Why leave out broadcasting your message?
Randomly pick 10 businesses that are in your industry or locale. Google or Yahoo those businesses and jot down the results. Then google or yahoo your business...how do you compare?
Odds are you will find one or two that have a concerted online broadcasting campaign and the rest don't. If you have developed your marketing plan you will see yourself in the top two or three but if not you will find yourself in the bottom seven or eight.
Then ask yourself how many people are using yellow pages, listening to radio ads, watching specific TV ads or reading newspaper ads? If your phone is not ringing from these traditional mass media, why are you still investing in them?
Wouldn't it make sense to be in the top tier in your industry so that when folks search they can find you?
It's your choice...right?