I disagree with some people here. I hate it when medical students are on UWorld instead of focusing on what is going on in the clinical space. If you have free time, go check on your patients; if you've done that, find an interesting topic related to whats going on with one of your patients, read up on it, and talk to me or the other residents about it.
I had a rotating 4th year doing UWorld while on nights the other night (on NICU) while we were slammed with deliveries the entire night. I had to keep asking her to help because she was so busy doing her UWorld questions instead of being pro-active. As a medical student, I never did Uworld at the hospital, I focused on my patients. I am not a genius, so if I could find time after going home to study and still do well, other people can do that too. Its all about situational awareness, as a medical student you have the ability to contribute to the team by really spending time with your patients and reading about educational topics to talk to the group. When I see a med student doing practice questions, I don't think
"wow that's a great medical student, he dedicates himself to his studies", instead I think "wow that's a medical student who cares more about his grades than acting as a team player."