Time Management
You know the deal: There are just 24 hours in each day. What you do with that time makes all the difference. While high-school students average 35 hours per week of class time, college students log an average of 15 to 18 hours per week.
Getting your "free" time under control now will help prepare you for managing that extra 20 hours a week come freshman year of college — when you'll need to study and want to socialize more than ever.
If you don't already, start using a daily planner. This could be a datebook you keep in your bag, an online version you maintain at home, or both. It's easy to over-schedule or "double-book" if we aren't careful. Manage your time wisely and you'll get the maximum out of each day.