Advertise on the back of other people’s business cards.
Viral Marketing is THE buzz word these days. (If you don’t know what viral marketing means, please visit this wikipedia article or this article.)
“A virus doesn’t even have to mate — he just replicates, again and again with geometrically increasing power, doubling with each iteration:
1
11
1111
11111111
1111111111111111
11111111111111111111111111111111
1111111111111111111111111111111111111111111111111111111
In a few short generations, a virus population can explode.”
Excerpt from “The Six Simple Principals of Viral Marketing“