a current student here
Be prepared for any course, and study for quizzes/exams/test. Don't be afraid to ask any questions during class, teachers love when students ask questions. If you can't attend to class, make sure you email the professor ahead of time and explain why you can't attend class, they might not mark you absent. Don't text in class, professors dislike when students are texting and not paying attention, is rude. STUDY for exams! Professor's like to be fair when it comes to exams, they want you to pass.