Tip #2: Don't be afraid to email
Got a question? Don't understand a concept? Need to communicate about a personal issue that's affecting your work in the class? Don't be afraid to email for help or clarification (after you check the syllabus and textbook, of course!).
Some students are scared to email for fear of sounding silly or asking a "stupid question." We're not so bad, though. If you need help, just ask.
I can't help you if I don't know you're having trouble.
Believe me, I'd much rather hear from you now instead of 3 hours before the final or after you've missed 3 weeks of class. The sooner you get in touch, the better off we'll both be.