I decided I wanted to get into independent software development. I found a company ($1mm revenue) I'd done a little bit of business with (unrelated)

I sent them a mockup of what I thought their web-page should be (4 hours of work?), one meeting later I'd locked down a nice 5 figure contract to develop an internal app (they decided they didn't want a web page) and it looks to become an ongoing relationship.

The web page, I later found out, is what really hooked them, despite them not wanting it ultimately.