Friends and Family connections, if you do not have your own, can be a good way of generating business. Ask them if their or any contacts of theirs have need for a web host or ask them to get the word out about your company.
Also, think about offline advertising, like printing out a ton of fliers and pasting them around high traffic areas.
A Collection of Web Hosts
Small biographies on hosts, uptime reports and some reviews
Feel free to add your review or add a host that isn't on the list.