How We can build a link building as per SEO

I have found press releases to be extremely effective. Submit a press release for free to a website such as bignews.biz and include a link back to your site in the content. Press releases are distributed to countless other websites on the internet so you have the opportunity to turn your 1 link on a press release to thousands scattered all over the internet.

Forum's are a very good way to gain links. Find an industry related forum and be sure to put a link to the blog in your signature. If you provide insightful, valuable information then people will start to respect you as an authority in the subject and therefore visit your signature link as well as giving you links back to your site.
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Link Building|Link Building Services