I started the preparation of CK by doing UW questions. After several hundred questions (random, timed) I found my score fell below the average (50s % correct). I have not reviewed any particular books. I planned to go through the UW questions and explanations as thoroughly as possible and then do a second pass. Meanwhile, I realized that the 1st pass UW score may well predict how well I do on the real thing. I would have 2-3 months for the test with a goal to break 240. I am not sure if the current plan works for my goal. Any advices would be greatly appreciated!