The following are that methods by which you can build high quality backlinks:
1. The links that you build must be relevant to your content and your website.
2. Check the Page Rank and Alexa Rank of the website that you are linking to. (That website must have a good PR and alexa rank less than 1,00,000 in world).
3. Also check that the website you are linking to is not penalised by the major search engines. For this visit enter the website url and check: pixelgroove.com/serp/sandbox_checker .
Myself, Vishal and I am an SEO Expert. If you need more help, please mail me at
[email protected].