Recently I got to know about a new online service that checks text for copied content. It basically uses a 3 step process for tracking Plagiarism. After visiting the homepage you need to click on the following button to go to the page where you will be prompted to paste the text which you want to check for Plagiarism. It opens result in a new page where it lists rates the text in percentage plag rate.
Online Plagiarism Checker For Bloggers & Freelance Writers
Check out the Stewart Library's new information literacy aid. The HeLIOS tutorial is designed to help students learn library and research skills that will help them find information for papers and projects. The program has eighteen different lessons that focus on topics such as plagiarism, developing a research question, and finding information online. Each lesson is in the style of a graphic novel and is intended for high school students. HeLIOS Jr. is for elementary school students.
If you buy content, or "take inspiration" from existing content for your site or blog, run it through copyscape first. They'll scour the net and tell you if your content is "duplicate", which will get you in trouble with Google, or "original", which Google loves!