As an instructor you should always model professionalism and lead by example. Always look for ways to grow and develop yourself and your students.
The five C's of an effective instructor: Credible, Candid, Compassionate, Committed, and Clear
Instructor Competencies: Technical, Professional, and Personal
I still love the quote of the 6 P's, "Purposeful Prior Planning Prevents Poor Performance." In the military we said it just a little bit different.