Finding and keeping new clients

I have started my own software consulting firm and have been vigorously
working for my single client for the past 6 months or so.  Now I find
myself
in a lull and and looking for a new project.  I am haiving a hard time
finding new clients to take advantage of my software services, mainly
software development for numerous platforms.  My first and only client has
been great, but I feel the project is basically done and in the can.  I've
tried the usual online sources to attract new customers, like Monster and
Hot Jobs.  I've even gotten hooked into eworkmarkets.com, but there aren't
any real op****tunities for me to take advantage of right now.

How do I go out and attract more clients in such a way as to keep a
constant
stream of projects coming in?