As a real estate agent I have attended many home inspections. I have found over the years the same few inspectors doing a majority of the inspections. As a realtor I am almost always asked by my buyers "who do you reccomend?". And I always explain to them that my employer does NOT allow me to refer home inspectors for reasons of liability. I usually tell them to check in the phone and make sure they are licensed etc.
Last summer I started asking my buyers were they found their home inspector and almost all of them said "ONLINE". I had one home inspector perform four inspections. Every buyer said the same thing "He was the only one online that had his prices posted".
It makes sense, as a real estate agent I already know that %70 of homebuyers start their search online.
Homebuyers want INFORMATION. They dont't want numbers in the phonebook they want to make an informed decision before choosing a home inspector.
So as a home inspector the best way to promote your business is get it in front of %70 of the buyers, online.
There are many home inspector directories online. You best bet is finding one local, or creating your own site.
http://www.himilwaukee.com is a directory of local Milwaukee home inspectors.