The certification site lists the courses that are useful.
https://support.sas.com/certify/creds/ct.html#s1=3
If you don't want to take the courses you can buy the course notes for $100/course, see the SAS bookstore.
The advanced certification guide would have everything you need here, minus the report writing essentials course. For that I'd get papers from Lexjansen.com once I looked up the topics covered in the course.
Above all, practice is what's going to get you there. Reviewing papers from Lexjansen.com from companies that hire clinical programmers isn't a bad idea either.
Good Luck!
EDIT: the first programming and stats course are free from SAS, http://support.sas.com/training/tutorial/
If you're in the Advanced stream you probably have the programming 1/2 courses topics covered.