This business about the "best" answer is nonsense. The right answers are right (they are supported by the passage AND answer the question asked) and the wrong answers are wrong (they are either not supported by the passage or they don't answer the question asked). The writers never give you two right answers where one is subjectively "better" than the other.
That being said, the ONLY questions on which I would skip reading all the answer choices are Must be True questions in the Games section.
After more practice I definitely understand the why the "best" answer concept is off - it truely is either right or wrong. That being said - why do you only skip Must Be True LG questions? What about Inference LR questions (sometimes presented as Must be True)? I'm sure there are other question types that warrant finding the answer and moving on?
This concept seems to be left out of discussion in most of my study material (Princeton Review and Kaplan). In the explanations they often say something like: "B) This is the correct answer because of _____ - move on to the next question. But for study purposes lets look at why the other answers are wrong." The majority of the times they don't say that - but when they do its not really clear why?