What is Private Label Rights Content?
Private label rights (PLR) content is written material (such as articles, eBooks, or auto responder content) that you can purchase and claim authorship of; there are different kinds of PLR content out there, different methods of acquiring it and different rights given to you once you've acquired it. Generally, however, the right to claim authorship also gains you the right to edit the content, break it apart, compile it into a larger resource, publish it on your website, and so forth.

In general PLR content is great for affiliate marketers because it's cheap, you can edit it, insert your own affiliate links and you don't have to give credit to anyone else!

Ideas for using PLR content
Re-word them for website content yourself (or hire someone to do this for you!).
Compile a PLR article pack into an eBook and use it as a viral marketing tool.
Use them in your auto responder series.
Use the articles to create scripts for YouTube videos. You could simply create videos, similar to this one, which contain a number of PowerPoint slides and photos, put them up on YouTube and embed them into your website. YouTube is a growing source of Internet traffic and not many people are using private label rights in this way.
Pick bits from different articles and create a new and original "mash up".
Use PLR articles as a starting point for research and inspiration.