Writing a blog it’s very important to avoid duplicate posts. Similar or even duplicate posts can impact blog’s Page Rank. The other thing is that it won’t be interesting to read your similar posts so there is a solution how to check for duplicate posts on your blog. 
Well, I have found very useful plugin named Duplicate Post checker. Author of the plugin affirm that it is very helpful if you post jokes, poems etc however I have tried it and can say that it may help you even if your blog is about other things. This plugin will check if other similar posts already exist on your blog. This way you can modify it to avoid duplicate posts.
I want to notice that this plugin can check if you have similar posts on your blog only and not on the world wide web. I believe this will help bloggers to improve their SEO and increase Page Rank because if you have a lot of posts on your blog it is not easy to remember if you have ever writen similar post before. Try this Duplicate post checker plugin. You can also try plugins for every bogger.
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Dec 15, 2009 at 11:59:38
Sounds like an interesting tool. Let me know if you find it and how it works.