This means stay focused on what is important and work with urgency. It means that every time you sit down to study you have your goals for success on the next test in the front of your mind. Try to recall how focused and task-oriented you were last exam period. Recapture that every day. Prepare for class.
Most students read after class.
You should read ahead. You get one chance at getting good class notes, and you will more thoroughly understand what is going on if you are familiar with the material when you get there. Take notes aggressively Know what you want to get from the class and be focussed on getting it down in your notes. The answers to the test questions, of course. This means you must be prepared before class so that you will recognize the important information when you hear it.