We all know that Google likes websites with solid backlinks. So if you have a bunch of good content, it is likely another site has stolen some of that good content. I like to reach out to them with a nice but firm email saying they can keep the content if they add a backlink to my site. When facing a possible copyright infringement lawsuit, websites tend to be very happy to give me backlinks to resolve the situation. I usually don't even need to worry about duplicate content because I regularly revise my content to keep it fresh & accurate.
What other ways do you use to gain backlinks and/or deal with stolen content?