Guest posting, article submission, blog posting and forums posting are the best techniques for building quality of backlinks for a website.

Social networking & Forums is effective way of backlinks.

article submission,forum posting and blog comments on high PR sites helps you to get good quality back links

Use Guest post, Blog posting, Commenting and social bookmarking on high pr sites. These all are really very helpful to sites.

As per my view Social networking is the best way to improve traffic and also do social bookmarking,forums, blog commenting on high quality sites.

Forum posting and blog commenting in high page rank related websites helps to increase quality backlinks

For backling try to submit site in do follow sites and you can share links with your niche sites also. Publish content online like blogs, articles, press release, social bookmarking, directories and many more.

Forum Posting, Article Subm, Fresh Contents

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To get the quality back links to your site, the techniques are
Forum posting
Blog commenting
Social bookmarking submission
Article submission

I believe that social media and paid promotions are the best way to reach new customers.

In case, you are planning to deal with organic and natural quality for the backlinks, wait no further and get in touch with various SEO functions, like forum, social bookmarking and more.

Use Original content, And Do Article submission, Blog Submission & Blog Commenting.

1) Web 2.0 links
2) Submit your link to high PR websites
3) Social bookmarking ( 3 or more PR)
4) Article submissions
5) Social sharing
6) Profile links
7) Image Sharing
8) Forum

Like everyone is saying - Social Networking, Web 2.0, Forums and creating great content on the market. Some bloggers have introduced new methods like "Moving Man methods", Guestographics (infographics)

If you want to get quality back link for your site then you have need to find high PR and relevant back link site for your business.