To make the very most of your time during office hours, I suggest you should:
Study your textbook and lecture notes thoroughly and attempt the assigned
problems before you go to office hours.
Try to identify specific questions or concepts you need to address during the
office hours.
Avoid waiting until the day before the test or the day before an assignment is
due to seek assistance. Study a few hours each day, and keep up with your
assignments. It is EASIER to keep up than to catch up!
Use other resources such as formal study groups and informal homework-help
groups.