Skip class. Some large lectures may not have a set attendance policy, allowing you to pass the course without going but this places you in a bad position for the standardized exam. Copying notes from someone else does not replace firsthand lecture experience, so while skipping class may not hurt your overall grade, it can work against you for the standardized test.
Avoid taking detailed notes. Notes will help you retain the information, and while vague recollection of class exercises can help you pass the actual course, your memory will have likely faded prior to the standardized test. A lack of detailed notes could lead to improper test preparation.
Cram your studying in the night before a test or assignment. You will be more prepared and relaxed while taking the test if you give yourself more preparation time than if you try to cram the night before. Cramming may help you pass a test or assignment in the short-term, but you will likely have trouble recalling that information later during a standardized test and could suffer a failing grade as a result.
Review the course material and previous tests for only a few minutes prior to the standardized test. You'll need to properly prepare for a standardized test even if you aced the course. Failure to adequately study for the standardized test could lead to a failing grade no matter how high your grade was in the class itself since you won't remember the information as clearly in as much details as what might be required.
Write down your answers on the exam quickly without fully reviewing the questions. It is important to read each question of a standardized test carefully to fully understand what the question is asking. If you underestimate the difficulty of the exam because of a high score in the class, you could fly through the test quickly, possibly writing down wrong answers because you didn't fully comprehend what was being asked.