My advice to new teachers would be:
Study your lessons and know what you are teaching BEFORE you teach the lesson. There is a lot of studying that needs to happen so that you feel prepared.
Ask questions....lots and lots of questions.
Find a friend on campus that will make you laugh, wants to hear about your day and can give sound advice.
Beg, borrow and steal (fabulous ideas)!
Be willing to learn from the wonderful and experienced teachers around you. The best teachers always learn something new everyday.