Thanks for replying. It's great to get input as I am new to this marketing thing.
We have tried a combination of all methods mentioned above. Our biggest return has been word of mouth.
Postal campaign -- eh. For the amount of time spent doing research on potential clients, the return has been dismal. We kept record of the hits to our website after sending out the brochures. The traffic did go up a bit, but no contacts.
There have been quite a few clicks on our banner ads, which are running on sites associated with the type of clients we are looking to acquire. I suppose it will take some time before those clicks produce results.
I am curious about launching an advertisement on Facebook, but not sure if the eyes are there for sign products.
A marketing article stated that many business owners get frustrated when they don't get a return on their campaigns right away. I am not one of them. Instead, I will keep at it until the right combination or luck kicks in. As long as the budget holds out, I'm in it.