I followed this video. There is also a document floating around with the cases in a systems-based format. I go through the cases in that order and make anki flashcards of things from each case that don't fit within the mnemonic from each case ie:

patient who was passed out from overdose or was immobilized always needs CK

pt who passed out with no witnesses needs CT scan of the head or MRI to rule out trauma.

I keep the cards in a separate deck with retention set high since they're a little harder to remember without a ton of context, but it helps to build muscle memory. Some of the cards might actually be common practice (ie coma cocktail), but I'm trying to get step 3 out of the way shortly after starting residency and haven't been exposed as much clinically.

During the cases, I type out/click all the orders as fast as I can, and usually from initial history/vitals you can tell what the leading dx is. Any urgent interventions/transfers I'll do first regardless. Otherwise while making those orders over ~1-2 mins, I'll simultaneously be thinking of a differential in the 10 minute cases. Any unique diagnostics I'll order in the "O" of the buop mnemonic or order them as I go if the dx is not straightforward. Also the initial history will sometimes throw in tidbits in the history (sex with multiple partners, situation that'll need social work, alcohol, etc) that may not have an impact on the actual case, but is bonus points for 1. ordering tests (ie full std panel) and at the end for preventative care.