What have you done to make extra cash?

What creative things have you done to make extra cash in this difficult economy?

Take a look at this Yahoo Finance Article about 7 people who have found some unique ways to help pay off debt and simply get by week to week. You'll see everything from mystery shopping to donating plasma to flipping art on ebay and more.

I bet there are a number of readers who would be very interested in reading about other ideas for making some extra money (other than couponing, of course!). Any thoughts?

In addition, sometimes simply spending less is the answer. What have you cut back on to make ends meet a little more easily?