There are some rules you should to follow when you start building links.
[1] Vary anchor text of your website.
[2] Include different Keywords in title.
[3] Link site from different class C – IPs (Important factor for SERP.)
[4] Vary Type of site, like blogs, article resources, directories etc..
[5] Not get all links from newer sites, and try to get links from older (and trusted) sites as well.
[6] Not get links from same location (i.e. all links from footer etc..)
[7] Try to get links from relevant content/industry.
[8] Should Have varied PR from pages you’re linking (If you’re getting a lot of PR6 Links that will adversely affect as Google may think, you’re purchasing high PR Links
[9] Try to get authority links, like links from news sites… etc.
[10] Do not try to build hundreds of links quickly.
