Focus on individual sections, and practice makes perfect. I suggest retaking the first tests till you start getting 22-23 and then moving on to the other tests. But make sure you understand why every question is correct. Also, get really good at 3 sections (Cubes, pattern and TFE for me). You have to have strengths, then you can spend more time on your weaknesses. Just keep with it, and don't get discouraged. But do realize that the real PAT is harder then CDP, so you may want to do a few achiever tests.
