I didn't take the RAC US, so I don't know of any RACUS-specific strategies. And a lot of it depends on how you take tests. I have my multiple-guess testing strategy down to a science, so I just applied it to the RAC. It really depends in your testing and learning style.
I learn by reading, talking about it (probably most annoying to my colleagues), and then practicing it. So, I would read the chapters in the Fundamentals book, talk it through with my study group (even through hypotheticals), and then do practice tests. Then (and this is the important part) I would correct the practice tests and do two things: analyze how many I got wrong/right in each area, and read through the answer responses to learn why
the answer choices are what they are. The first part is how you learn what you need to really study, the second part is how you learn what the questions are really asking for. Another output to this method is that you know what kinds of questions the test will ask. Then you know whether or not you really need to memorize all those foods regulations.
If you're one of those people that can magically do really well at random multiple-guess tests, then you may not need to go through all this. I'm not, so this is what I do.