Having a page rank is extremely beneficial simply because there are a lot things people will do for a simple link on a high PR website. Since a page rank update occurs every two to three months, it gives everyone plenty of time to increase your traffic. Here is one of the many ways you can increase your rank and a possible way to get high PR on the next update.
Search for Do-Follow Blogs
A simple google search for “do-follow blogs’ will provide you with enough results to guarantee you with lots and incoming links. Try to choose highest rank blogs and make sure they are a do-follow and make a comment. But make sure you make a clear and meaningful comment and not just do it for a link. Making meaningful comments will earn their trust and you can always go back and post for new items on that blog.Make a listing of all the blogs you have joined for future reference.
You can find some do-follow blogs from this site.. I hope this will help you in your search for links.Goodluck.