Know the names of your professors, instructors, and teaching assistants. You need to know what your accommodations are and why you need them, or you might be easily talked out of them by a professor or instructor. Believe in yourself. Know your rights and what you are eligible for. Make sure you set aside time for yourself every day.
Nothing helps like going to class every day.
Sit in front of the class and make eye contact with the professor. They're likely to be nicer if you are a person to them and not just a name in a grade book. Look for used textbooks that have been highlighted carefully. Keep up with your reading and class assignments. Look at your classes as opportunities to improve your abilities rather than tests of your competence.