Do-follow backlinks are one more tool that you have at your disposal in your search engine marketing campaign. The more links to your website you get from reputable blog sites, social media networks, and other websites, the higher your site will rank on search engine results pages (SERP). Here are a few places where you can get free do-follow backlinks.

WordPress.com

WordPress is one the most useful free blog sites out there, in terms of SEO marketing. WordPress's easy-to-use meta tags system and linking tools make it easy for search engines to navigate. Links that you get from WordPress are thus high quality links that increase your own sites search engine rankings.

Squidoo.com

Squidoo is a site that allows you to create a single web page that you can then post on as long and as much as you want. Be careful not to let the links to your site overwhelm the content, however, as search engines may penalize your rank due to over-linking.

Blogger.com

Blogger is one of the most well-known blog sites today. Set up a blog, post quality content and update regularly, and you'll be rewarded with good quality back links. 

w3schools.com

W3schools.com is a site that guides you in the process of using HTML to create your own pages. A bit of work is required, but it pays good dividends.

FreeTrafficSystem.com

One of the lesser known of the sites on this list, freetrafficsystem.com is a great place to obtain backlinks, though it requires a bit of computer savvy. 

Linkmarket.com

A free meeting place for websites wanting to exchange links for free. And though reciprocal linking is not ass weighty as one-way linking, it is still a great tool to use.

 Article sites

Sites like EzineArticles.com and goarticles.com are one of the most valuable sources of backlinks. It's free to set up an account and post, and if your posts get a good following, it can help your SEO efforts tremendously.

Blog comments

Backlinks from blog comments are also a good way to get do-follow links. To increase your chances of having your blog comment accepted, make sure you read the post your commenting on fully and comment intelligently. 

Forums

Forums don't carry as much weight in terms of boosting search engine rankings, but their presence online is immense and it's still worthwhile to dedicate sometime to posting on them.

Press releases

The search engine optimization rules of press releases are slightly different than the one for website content and blogs, but they can still be a good place to get do-follow links. For rules on how to write a press releases look at websites like prwebdirect.com.