If you are looking to get backlinks which are of high PR then this post would actually tell you how you can search for free text links that would match with your content.
You would need to use Google Search Engine in order to look for backlinks.
There are lots of sites which allow you to place your links easily . These are content rich pages which are waiting to be exploited.
Here's what you would need to do
1. Enter the following code into Google Search - "site:pbwiki.com the password is"
2. You would be shown a list of sites with their passwords in their header. Many of the pages have PageRank as high as PR7 and they are "Do-Follow"
3. Just go any of the site and click on edit page. It would ask you for invite key . As you see these sites have key in their header and you can now log-in.
4. Enter your link into the page and Save it.
You are done with getting a Link. Now you have to be smart to place it somewhere where others might not remove it thinking it to be spam. It won't be spam if its relevant.
When you search "site:pbwiki.com the password is" , the problem is that there are lots of pages shown which might not be relevant to what you are looking for.
If you want to add relevancy then you need to customise the query a bit.
Here's an example
Lets say you are searching for tech content pages.
Enter "site:pbwiki.com tech the password is" in google search to get pages where you can place your link and most of the pages would be related to tech.
This is one of the best way to build links which are of high grade quality and get high search rankings.
Alternatively some pbwiki sites use "the pass is" rather than "the password is" , so you can enter "site:pbwiki.com the pass is" to search for more pages.