If you want to increase the value of your site then you should improve the content of your site and always try to create quality back links for your site. Both things are important for increasing value of site.
There are many tools to check back links and also some softwares available but i think majesticseo is best tool to check back link. I also us this software. Anyway thank you all for sharing different ideas.
There are many ways to create high quality back links. With forum posting,blog commenting and social bookmarking we can get lot of quality back links. There are also many tools for getting back links like majesticseo.