Build your own radiology atlas from interesting cases you've actually seen

I kept a folder on my phone of anonymised X-rays and CTs from cases I'd been involved in, organised by subspecialty. Over 18 months of training this grew into a personal radiology atlas of ~400 images with my own annotations. Come exam time, I had actual clinical images I recognised rather than textbook ideal examples. For the clinical exam, where you're interpreting real films under time pressure, practising with 'messy' clinical radiographs rather than pristine examples is a huge advantage.