I was again reading another article from Desktop Bundle, here is my SOURCE.
It is something I feel my readers would like 🙂 I may still have a PR of zero but for some, this may be important to them. It is how your page rank may possible dropped to zero :
1. I change the title of the blog.
Google has the archive for every blog history. So when you change the title and topics. It is possible that Google will recognize your blog as new one.
So keep the blog as it was from the title to the topics.
2. I add google sitemap plugin.
This plugin make Google read your blog easily so they can figured this is a new blog and even worse caught your paid review and link trade.
That is from one of my new favorite blog.. Maybe there are more reason, but now, what matters is to avoid this stuff. As for me, increase my page rank 😉 Been doing a lot of effort to my site and I am enjoying! 🙂