As you can see, people think practice is important! I would emphasize the "out loud" component of practice. You'll identify sloppiness out loud that you'd never identify if you're just reciting it in your head.
The other thing that I found helpful was to decide on cut-offs for various things, including justification where able. For example, patient comes in for ambulatory surgery with a finger stick of 301, what's your move? Patient has a sodium of 126, do you proceed? why/not? You will definitely be asked to discuss a DDx for various vital sign changes intra-op; think through an memorize your approach to HTN hypotension, tachy, brady, desaturation, etc. These should be basically rote by the time you are tested.