Go to class! And be on time.
The single most important key to success in any class is to spend enough time studying!!! Study with soothing music in the background; it really does help with concentration.
Manage your time... don't procrastinate. Stay on top of your assignments. Use your agenda to help out.
Organization of your work. Keep it together. Use tabs to help out. Don't stuff things in your backpack, they just get lost or destroyed.
Balance your life and activities. Keep in mind, school is your job at the moment and it is the most important thing to succeed at for it will help see you to your life goals. It is the one thing that will remain with you all your life. Everything else will fade with time.
(Picture by PaulWesley222)