As we know there is no easy job, and it can take time to build some quality links to your site.
But it certainly be a profit.
Today, many Internet companies use the finest professional full-time employees in building backlinks.
When building backlinks to your site should be checked several elements:
Page rank of the linking page
The Page rank of the linking page affects the amount of PR juice "that page gives you. Page rank as this page links you, the more will be Page rank your site. Therefore a vote from a reliable (Page rank 7 for example) is more important than a link from a relatively unknown (Page rank 3 for example).
But when asked to choose a link between two sites with Page rank 7, the Number of outbound links within the sites is the one who helps you make the decision.
The value passed to your page equivalent to - Page rank of the page divided by the total number of outbound links on the page. So a link from Page rank2 could be better than a link from the 4 - Page rank that has more than 100 outbound links that links high page ranking top themes so little value.
Great importance to find links from relevant sites only.
Search engines more important relationship links that point to your site related to your niche sites than they do the links between the niches that are not related.
Anchor-Text:
Linked text visible on the web page known as anchor text. This text is very important for search engines, you must ensure that the most important keywords appear in the anchor text of links pointing to your site visitors. A common mistake is to use "see here" / "Read more" as link anchor text.
Not relevant anchor texts such as these will not help you rank well for your main keywords.