I think first off be yourself. If you're not it will show. The best medical students I have seen have been genuinely enthusiastic about the field, they read, present a case at grand rounds and the do things to make your life easier. Examples, I teach my med students how to refract so that by the end of the rotation, they know that if we have a patient who needs a refraction and there is an open room they will start refracting that patient. Another example, wiping off the aplanator tip /c and alcohol pad, or better yet learning to applanate by the end of your rotation. Things that other med students have done that were particularly impressive were to show up to journal club and present an article, take a night of call /c the residents, there is a good chance you wont be called in anyway. Doing a project is a good idea, getting to know the faculty well is also a good idea, and a project is a great way to do this. Try to learn how to use the slit lamp and indirect, these are not easy to do. Don't spend more than a few minutes trying each, it will take several patients before you get the hang of it. If you spend too long looking while not knowing how to use the equipment, it just slows everyone down. Most of all I think be someone you would want to work with.
