Here's a surprising fact: students are more likely to behave when they feel like their teacher actually caring about them. So, take the time to get to know your students as individuals, and find out what makes them tick. Ask them about their hobbies, their interests, and their goals.
It's also important to show genuine interest in their lives, and to be approachable when they need help or just need to talk. And, don't be afraid to be a little silly or show your human side – it can go a long way in building trust and rapport with your students.