This is indeed an excellent primer to be followed. Kudos and hats off to the writer.
I wish I had such direction when I was preparing for CAT, the results may have been different... I will send this article out to friends/relatives for reference and learning. I am certain it shall prove useful for all preparing for competitive exams where a GD is likely.
Please continue the good work and make more of your articles/teachings/doctrines available to the denizens of the world wide web.