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					Originally Posted by Blueface  Be prepared to ask pertinent questions of the interviewer that will show you have researched the company and the position and are further inquisitive. | 
	
 ^^^^This is vital. 
I'll add something I remember Tony Robbins saying, I''ll paraphrase: assume the same posture/attitude/way of speaking/etc. as the interviewer. This subconsciously makes the interviewer feel you are like them, people usually think they are pretty cool. They are then more comfortable, like you, etc. I don't this should be taken to the extreme(mocking), but it has always made sense to me.