Other useful information for Civils preparation

CSAT + Civil service guidance and tips
 http://www.itcsa.blogspot.in/2012/09/some-tips-to-overcome-csat-language.html 

Civils for Telugu Medium students

 http://www.itcsa.blogspot.in
http://civilsintelugu.blogspot.com/

Essay and other useful blogs

http://thecivilservicesdream.blogspot.com/

http://anaydwivedi.wordpress.com/2010/08/21/references/

Optional wise analysis of achievers:

http://upscblog.com/wp-content/uploads/2011/05/UPSC-Optional-wise-results-2010-final.pdf

Sridhars blog for GS

http://sridhargedela.blogspot.com/2010/12/books-for-general-studies.html

Anay dwivedis blog for PubAd, Psychology, and essay

anaydwivedi.wordpress.com

Interviews

http://upscblog.com/category/upsc-interviews/

Simple advice: Spending more time on internet will widen your knowledge, but it'll also waste your time. So, use internet judiciously.