Ask HN: Where should I look for clients if I am starting my own software house?

So, I am guessing I am not the only person who has ever faced this issue (There are probably many people right now facing the same issue)

I have been working for a number of years as a software engineer. I would consider myself quite experienced with many technologies, and I have a strong technical background.

Here's my weakness though... I have always worked for companies that are somewhat complete, or have a very large client base already. I started my career at Microsoft, for example. Their client base was already massive when I got there, and the people responsible for finding new clients were in a part of the company I never seemed to have to deal with as a developer.

Now though, I find myself surrounded by a group of like-minded friends with similar experience who have decided we all need to try and do our own thing together. We are willing to make software for most needs (obviously, within reason, there are obviously projects we can't afford to be involved in or are outside of our knowledge domain... such as space travel, or nuclear physics).

Anyway, to get back on track, My question here, is how do I get clients, where do I search? The business and client finding side of things is something I haven't done before. I am looking forward to learning, but I could use some knowledge right about now.

Thanks for any help you can provide.