One of the most important factors in doing well in college is time management. Some professors will tell you that they expect you to spend 15 - 20 hours per week on their course. Others will just expect it. Make sure that you organize your time effectively, study efficiently, and keep up with your work. Attend every class session. Go to clinics and review sessions even if you feel you don't need it. Use your weekends wisely. You will need those hours to catch up on your studies, hang out with your friends, or even get ahead on your academic work. The libraries and computing centers are open on weekends for a good reason. Use them!