General GMAT Questions and Strategies | Debate: From "solving questions" to "Getting to the right answer"

I have read several threads and sooner or later there is always an advice in these lines:

"...you focus on solving the questions instead of getting to the right answer..."

How is this so crucial to GMAT success and how one can make this mindset shift and/or learn how to approach questions in such a fashion?

I would like to hear people's views about it and how YOU apply it when tacking GMAT questions.

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