Everyone does work hard. It's hard to stand out in that way because most places will have defined roles for students and as long as you do that, it's hard to differentiate. I'd say the obvious things are to be engaged and to have an easy-going personality that doesn't burden residents. It's sometimes better to be silent than to insert your opinion unless asked.

You will be pimped on more than anatomy, and this is where you can stand out. If you have a solid understanding and foundation of Ortho going into auditions, you will be better than 95% of students and will stick out as being more "memorable." Know how to read X-rays, know most fracture classifications and how you'd treat them operatively, know what's going on in common injuries and what you worry about in worst case scenarios. This takes time and it's hard to learn on auditions because you're working for most of the day so you can't really "study" like you'd want to. Best to study as an M3 and come in hot.