Passed the CCSA R80 exam this morning! I failed the first time by 10 points
I took the course from an authorized training center about 3 months ago that my employer paid for. I used the manual and the labs from that as most of my study material. If you have some Check Point experience, I believe you could use several of the admin guides to pass the exam. I have about 9 month, every day hands on Check Point experience for reference. Some of the CCSA course material is directly from some of the administrative guides.
This is a helpful resource for self study:
This study guide is going to be your best friend. It covers almost ALL of the topics you might see on the exam:
I also used CBT Nuggets R80 video course, which I did find very helpful when I didn't feel like reading. It also has hands on labs associated with the course.