For Mlaura:
Focus on the clinic questions; the American book has lots of administration questions that "you do not need to focus on so much...".
The general opinion is that the exam questions are of higher level of difficulty than the ones posted on the Canadian Alliance webside.
I would say do all the practice questions that you can find, in the clinical field, and focus very much on the matter in Colby and the Sullivan guide.
Best wishes,
Manuel