You can keep your Yellow Pages and media advertising.  Tradesmen in Yemen have an original and brilliant advertising method, which I really like.

Every day, those who are free to take on jobs congregate at strategic landmarks in the city of Sana’a.  Potential customers drive by and identify from a distance the type of tradesman they require as the men brandish a distinguishing symbol of their profession: the plumber holds aloft an adjustable spanner; the carpenter a saw; the painter a brush; the electrician an electric cable coil and so on.  Drivers stop and negotiations take place.