Journal clubs, drug info response, presentations, posters/pamphlets, drug monographs, etc. Here is where hospital rotations tend to result in much more stuff than retail. But that also support your interest in residency. Also included research, leadership stuff in there under a different section.
I bought a professional fabric, zippered, black, ringed folder, cost around $28. Sorry, didn't care to spend money on a leather one.
Organized mine this way:
Table of contents
CV with business card attched
Each rotation section in chronological order
Each rotation section with preceptor eval followed by most to least proud project
Thumb drive containing all the files
Final section with all the non-rotation works
Of course don't keep any HIPAA stuff in there
Yes it might be a bit of over kill, but I did want to have any regrets for not having tried hard enough.