We all now that links from educational (.edu) sites can mean a definite boost in your Google rankings. Here are some tips that you can use to get links to .edu sites quickly by leaving blog comments.
Identify "dofollow" .edu blogs in your target niche. By "dofollow" I mean blogs that allow visitors to leave comments with a "valid" (again, in Google's eyes) backlink to the commenter's website. You can do this by going to Google and typing in the following:
site:.edu *your target market*+blog
Of course, you'd type your actual target market in between the asterisks. For example, if your target market is advertising, you'd type *advertising*. If you can't locate a blog for your specific target market, try searching for a more general term. So say, If you can't find advertising, try marketing.
Now using this technique, you'll come up with a list of blogs that you can comment on. Here is where two free Firefox add-on tools will come in very handy
Search Status, which will allow you to identify which blogs use the dofollow attribute. If a blog doesn't use the dofollow attribute, you'll see a pink highlight around the comments section. If you see this pink highlight on a particular blog, you'll know to simply skip that one, since commenting on it won't give you the search engine boost you're lookng for.
SEO for Firefox, which, among other things, will allow you to see the Google pagerank, Alexa rank and other qualities of the blogs that show up in Google searches. In general, you want to comment on blogs that have a higher Pagerank (3 and above), as a higher pagerank will mean that the blog has more authority in Google's eyes, and a link from one of these sites will have more "juice", so to speak. Install both of these tools as add-ons to your Firefox browser. Don't worry, detailed instructions are on the sites - It should take less than a minute to install each.