While backlinks from forums and blogs are usually considered “low quality”, it’s still a good way of promoting your site as you can expect to recieve some direct traffic coming to your site from the links you post. Note that many blogs and some forums place the nofollow tag on links which won’t help with your sites link popularity.

Join relevant and popular forums and blogs in your niche and start commenting on the posts. But do not spam for links instead focus on building a relationship with other bloggers in order to get quality links. It is also a good idea to post or write relevant topics and invite other bloggers to comment on it. You can do it yourself or hire some freelance writer to do it for you on a regular basis.

Yes, forum signatures are a good way to build links. You should join popular forums in your niche, make a signature and insert a link to the homepage or some inner pages of your site and start contributing to ongoing discussions.

There are a number of ways which can help you to get other websites to link your site. Below is a list of link building tips that are likely to guarantee that you will receive free links from already established websites:

• Submit your site to Web Directories.
• Submit Press Releases to PR sites.
• Reciprocal Links with Similar Websites.
• Squidoo Lenses.
• Article Submissions.
• Social Media Profiles.
• Social Bookmarking Websites.
• Forum Signatures.
• Create a Tool, Theme or Widget.
• Blogs on Other Blog Platforms.
• Comment on Other Blogs.
• Guest posting on other blogs.
• Hold Contests.
• Collaborative Projects.
• Offer your Expertise.