Hi varun,
While Data Sufficiency is different from any "math" questions that you've ever had to deal with, the process for beating a DS question is standardized (it's always 4 or 5 steps, depending on the situation). DS question also test a variety of skills beyond math skills: organization, accuracy, attention-to-detail, thoroughness, etc., so you have to be willing to do ENOUGH work to prove what the answer is.
All that having been said, you've hinted at seeing various strategies for DS. What materials have you been using to try to learn this subject?
GMAT assassins aren't born, they're made,
Rich