Cool Method to Filter out HUGE NO. Of backlinks

Hello,

Here you can filter out the posts at google itself to find cool things.

Search

"site:.edu inurl:blog Keyword-"Comments Closed"-"You must be logged in" "Post your comments" "

at google and you will get cool results to post your comment..

Just thought of sharing something..

Thank you,
Vishnu

Very useful, have you got any other similar combinations for filtering?