Hi AJP36,
I took CDS first followed by PPP. I studied for about 3 weeks (while working full-time) for each and found quite a bit of overlap between the two (and passed both even though I was sure I had failed). I honestly wish I had taken PPP first but it might not matter for most people. I'm working on SPD right now (testing Monday afternoon) then SD a week later. SPD seems to overlap a decent amount so far based on what others in the areforum have shared to study.
Two things I did to utilize ALL of my time:
1. I constantly played on my music players the Schiff Harden lectures and the AIA Contract Podcasts while working, driving, cooking, etc. That way I didn't feel like I was losing out on valuable study time.
2. The information I was REALLY struggling with, I recorded into my phone as I read it, and added that to the music loop while working, driving...you get it
.
Best wishes!