In fact you can use google to find backlink. Just copy and pastes this into Google search box. Change keyword with your niche keyword.
Here I am listing some tips and tricks for those who are beginners in SEO and want to grasp it as soon as possible. Some of them are:
Keyword + site:wordpress.com
Keyword + site:blogspot.com
Keyword + site:typepad.com
Keyword + site:edublogs.org
Keyword + site:livejournal.com
Keyword + intext:”powered by wordpress”
Keyword + intext:”powered by typepad”
site:.com inurl:blog + “post a comment” + keyword
site:.com inurl:blog + “post a comment” + commentluv enabled
“Add comment” Your Keywords
“Post comment” Your Keywords
“Write comment” Your Keywords
Your Keywords “leave a comment” / “leave comment”
Your Keywords “Notify me of follow-up comments?”+”Submit the word you see below:”
Your Keywords “Remember my personal information” + “Notify me of follow-up comments?”
Your Keywords “Notify me of follow-up comments”
Your Keywords “This site uses KeywordLuv”
Your Keywords “Enable CommentLuv”
Your Keywords “You can use these tags”
Your Keywords “Powered by BlogEngine.NET”
Your Keywords “Allowed HTML tags:”
Your Keywords “top commenter”
“Keyword” “Powered By Blogger”
“Keyword” “Powered By WordPress”
“Keyword” “Powered By Typepad”
“Keyword” “Powered By Drupal”
“Keyword” “Powered By Blogengine”
“Keyword” “Powered By Movabletype”