For me personally...
I started off with KBB, its very easy and basic, If you can handle all the problems in KBB, then it will set you ready for CDP.
After I was done with KBB, I bought the 10-test version of CDP, and I only needed to do the first 8.
I normally did 1 test every 4-6 days and here is how I planned it out.
1) Suppose I take Test#1 today...
2) wait 4-6 days
3) after the 4-6 day wait, review all the mistakes you made on Test#1. CDP is great cause you can save all your tests, which dates you took em, what score you got, and what answers you got right and wrong, it stores EVERYTHING, its the best program ever
4) Now, after your done reviewing all Test#1 mistakes, don't jump into Test#2 right away, wait a few hours, or maybe till next day, that way Your mind set woun't be in "PAT MODE" ....... Reason I am saying this is on the real DAT, your going to jump right from the sciences into the PAT, your mind set will be totally not into "PAT MODE"... and thats the way you should practice
My scores were like this (from Test1 to 8)
17, 18, 18, 17, 21, 19, 20, 19
If your wondering why I waited 4-6 days between my testing and correction is because I really believe that subconsciously, your brain needs a period of time to develope its 3-D mapping skills. I believe the brain does it without even you knowing it. I am not basing this on any scientific evidence, its more of a hunch because every time I came back 4-6 days after my test, the answers seemed clearer and clearer, Like I would be looking over my mistakes and realizing how stupid I was by picking the wrong answer before I even went a head and realized what the correct answer was.... Its hard to explain