CSE @ MIC

Internet is the best source for preparing for the exam
Here are some of the links for effective preparation and knowledge towards GRE

greguide.com

mygretutor.com

syvum.com/gre

vyomworld.com/gre/index.asp

takethegre.com

and many more as i cant provide u a lot
just go to google and search for gre, u will fing thousand of sites helping u