For GS there is nothing called sufficient. The topic in itself is so vast that you need to regularly update yourself for it.

You can also check following link for the regular updates in GS space.

http://www.quizmantra.com/search/label/General%20Knowledge

This is a greato website. Thanks!

Please tell me if I enrolled in this online course on IAS General Studies & CSAT preparation would it be good. I actually already did.

Anyone else took this course?

Also, is The Hindu newspaper all that one needs to browse and read for current affairs? What percentage of the Gemneral studies paper is current affairs?

Check the site for lots of GK quizes and regular updates of current affairs and business news...

http://currentaffairs-businessnews.com/gk-quiz/