I contacted a local mortgage company and offered to build and advertise a website for them for free if they were willing to pay me 50% of any commissions from converted leads from the site. They agreed. The site has been up for 4 months now and in this time I've gotten it to the top of Google for the main keyword while at the same time using Adwords for a host of other keywords. So far I've spent about $300 on the whole thing and this month I've made close to $2,000 in commissions.
So if you're trying to think of something to do next (other than smoking cigarettes in a Wal-Mart parking lot) you should give this offline thing a try.