I usually have fairly accurate readings after a fashion. But, I'm also the sort of person to over-analyze something until it screams. I look at the art of the card, any chance word play, other definitions of keywords and any other connection I can find.

I was taught originally, that the cards don't know anything you don't know. They're more like a mental organization tool, helping you see what you secretly know, but don't remember you know. Sometimes I just have go back and do another reading to get a different perspective and put the two together.