If you come to class prepared, it will decrease your anxiety and make you appear prepared to the students, reducing their anxiety.

Schedule "off hours" to talk to the student about their behavior and ask yourself how you can tailor the lesson plan to keep them engaged. 

If you walk around the room while students are on their phones or talking, your presence is enough to clue them in that they are distracted and they will be redirected. 

I did learn that 10% of student's will miss due dates and I should find a way to keep track of those students and follow up.