Here is a list of 600 Dofollow forums from various niches that I managed to collect. All of them allow dofollow signatures. In most cases there are certain requirements that you need to fulfill before you get to add your signature. Sometimes you need to write certain amount of posts, or gain certain level of reputation, or just spend certain amount of time of the forum. In any case, dofollow links coming from forums still play an important role in SEO, so I hope this list will be valuable to you. (read more)

One of the best link building techniques is blog commenting. It's pretty easy to do, and if it becomes your daily habit, your site will rank higher and higher in Google. The essential part of blog commenting is to make sure that the link to your site gets published with attribute "dofollow," so that Google can count it as a vote for your site. Also, remember to use your main keywords as the anchor text (usually marked as "name" field). Make sure your comment is relevant to the article and that it contains valuable information. Otherwise, your comment might not be published, or will be removed very quickly. (read more)

It's not a secret that the number of high quality dofollow links to your site is one of the most important factors that determine your position in Google. If you don't know how this mechanism works, make sure to read Things to Consider When Getting Links. This article will become perhaps one of the most valuable SEO resources that you have ever read. I will show you exactly where to go to get free dofollow links to your site. (read more)