I tried several aids to help me learn this stack.
-The memory arts by David & Sarah Trustman
-an app (cant remember the name)
-Scenic 52 by Jamie D Grant (this ebook made it very easy for me to learn the stack quickly in one afternoon)
Allthough Scenic 52 worked for me really well, it might not for you. Every brain is diffirent..
And like RealityOne said, the method in Mnemonica is also a very good one.
Buy the book if you dont have it, not only for the method of learning the stack, but for all the rest that is in there