Getting back links from the high page rank are good. If you get any links from .edu or .org are very stonger.Try to create a blog to express your views so everyone will come and give you comments.If you want know about get some suggesstion from john chow blogging.
Backlinks are a risky business and can do as much damage as good. I've seen a lot of individuals selling backlinks from .edu and .org domains on portals such as fiverr.com - a PR 7 backlink from a .edu for $5? It's only when you visit the domain that you see it's saturated with links to domains in all industries and backgrounds. Google is smarter than you, believe it or not, and they can/will penalize you for it.
The best way to get healthy backlinks from high PR websites in my opinion is to either establish a partnership with a popular website (hard work) or to offer your experitise to a high PR blog free of charge and write a very good article. You can then use this oopportunity to secure backlinks. These links will of course have to be dofollow.
There are different clause by Google on back links strategy like if your site is getting back link from same theme based site which have PR 2 then google will give more priority to your site rather then your site is getting back link from PR 4 site of other niche.
In the present scenario google panda & penguin updates effects our site ranking so if you get backlinks from good and high pr sites so it is useful to your site and you can get good results of your website in google,now google is consider fresh content,quality work.