Anyone who owns a business knows how important it is to get the word out to being the customers in. My problem with advertising is the fact that you spend too much money for one ad that may or may not hit your target market. Radio, TV and newspaper ads are a gamble. To me they are a waste of money. I prefer the cost effectiveness of mobile advertising and that's exactly what inspired this post.
For tax purposes I lettered up my personal vehicle which is a form of mobile advertising when you consider the fact that I put 150 miles on my car each week doing my job. How many drivers see that lettering and call me as a result? How many more mention my company during relevant conversations? The best part about this form of advertising is the fact that I paid for it once and unlike a radio ad or a newspaper ad it never expires and it's a form of endless advertising. Once it has paid for itself it becomes free advertising. Similar to t-shirts we wear that advertise a company or an event. Even the dealership logo on your car is free advertising for that dealership.
That being said. ask yourself this; "How many businesses in your area (and beyond) would pay a small fee to rent ad space on your car or one of your shirts/coats? Now all you have to do is make a list and find out who to contact after you figure out what to charge and how much it will cost to make it all happen. Don't forget the mark up percentage so you aren't working for free.