If you had an IEP (individualized education plan) in high school, or have applied for disabilities accommodations, make sure you understand the process for obtaining such accommodations in college. Professors can’t accommodate you without a letter advising them on your needs and they can’t ask you questions to help accommodate you unless you self-disclose. Be prepared for some faculty to be incredibly ignorant about learning disabilities. Figure out what you need and ask for it.
There are three kinds of professors: those who say they never grant extensions (and mean it); those who say they don’t grant extensions (but will if you ask nicely and you haven’t been texting in class); and those who are total pushovers. Assume everyone is in category one, but if you really need more time, plan ahead, ask nicely, and have a good reason. Most of us are in category two.
Find your college or university’s writing center and use it. It’s like having a personal trainer for your papers. While we are on the subject of writing, don't plagiarize. We have Google. We’ll find you.