1) StatCounter.Com : Get register in Stat Counter Forum and update the information along with URL of the site. Once registered will be counted as a back link.
2) eHow.Com : Get registered in eHow.com and update the information in the similar passion one you have updated for stat counter. From here too you will be getting back link from your profile page.
3) Join Message Board Discussions at abcnews.go.com. Use tool WYSIWYG to post article, and also make sure to include the link back to the site along with your main keyword.
4) Create profile on espn.go.com and post a link to your website through “comment wall” also try to write some useful post over there.
5) Join Google Earth’s (forums) and continue to insert link in signature.
6) Join forum USAToday.com, iVillage.com and post link in similar passion you have done for Google earth
7) Create your profile on poynter.org, ojr.org, fannation.com, newsvine.com and post link of your website.
8) Create profile on blogs.msdn.com and post link of your website
9) Create account in Airamerica.com, dooce.com, time-blog.com, www.tvsquad.com, thatsfit.com and post comment on blog.
11) Comment at stories: longwarjournal.org
12) Share news in HappyNews.com.
13) Register at absolutepunk.net
14) Apart from that also get register in these sites, all of these will be providing you with back link : websiteoutlook.com, alexa.com, cubestat.com, quantcast.com, aboutdomain.org
15) Look for .edu .gov and really old .org blogs you will be finding it in a bunch and try to have a comment on them. Keep in mind never try to spam the thing else you will be deleted the moment.
So it is very much clear that creating profile is one of the best way to get link back from high PR site . Hope all these will help you to get a back link from High PR site and that too without spending a penny.