vary your teaching styles and learn to adapt to those you are not always familiar with teaching

introducing yourself and allowing the students to do so creates a more personable relationship.

by reviewing objectives, it gives an understanding on what will be happening and shows a structured element to the course. 

talk with your students about areas of your teaching they may struggle with learning. Also be engaging and have things for students to engage with during instructions so you are not just talking the whole time (ex. videos or educational games).