We have to bring quality links by searching keyword in google.com and then contact sites either we email or fill up form or guest posting , blog commenting etc. everybody in our team follow this things so maximum number of time we get same sites which are already brought by somebody. Please suggest me what are the variations of thing I should try while searching keywords so that I can get unique sites and what are the other things I can do for quality link building?
you should get some .edu back links, google loves it more than others. People say 1 .edu back link equals to 25 normal back links.
You can make links with .edu and .gov sites. This sites can keep a variation with your competitors site. Whatever site links you made, focus on to the quality because 100 quality sites link can beat with 1000 casual sites link and Google PR is also varies with the number of quality and relevant links.
when building a link for your website,dont forget to link your website with the relevent keyword of which your website is about.