No one on here seems to talk much about the clinical writtens. It usually has the highest pass rate, and is basically a culmination of all the studying you've been doing for 4 years. I can tell you what I did personally, and it seemed effective, although I haven't seen my score breakdowns yet.
I used the Hansen/Roach (Blue) book as well as the Hristov Question Based Review book to supplement and guide my studying throughout residency. I continued to read these throughout my PGY-5 year in preparation for our weekly case conferences and what not. This made me very familiar with at least the bigger studies, and served to give me 2 resources that I would already be familiar with.
As a side note, I did use larger texts as the backbone of my learning throughout residency, but these played a minor role in my actual board studying. I know people who have hardly touched text books and seem to have very impressive knowledge bases. Whatever works for you.
The last several months of PGY-5, I implemented an actual study plan. I read the Hristov book front to back, then I did the question book called a Radiation Oncology Study Guide (Hansen/Ord?), which seemed solid. I had Kinko's cut the binding off so I didn't have to keep flipping back and forth. Then I read the Hansen/Roach book. Then I did about 2/3rds of Radoncquestions.com. I didn't think I was going to get through many, but I burned through about 1000 questions in the 4 days before the test. Then I took the test.
The Blue book and the Hristov book are getting a little outdated, so keep that in mind. There is a new Hristov book coming out next month, so that should fix one of those problems. The question resources are fairly up to date which helps (especially Rad Onc Questions). Also, if you just pay attention to the major updates of trials coming out, and perhaps your program does them in journal club, you should be good.
I felt decently prepared. There isn't anything special I would have done in retrospect. The bulk of the test is stuff that you should get exposure to with reasonable study efforts throughout residency. The ones you don't know will be stuff that you've heard of and can narrow down answer choices. An even smaller percentage will be total garbage that make you want to punch someone in the face.
