1- Make a good first impression: Show them that you respect them as individuals from the beginning. Be a role model to establish a healthy relationship which highly relies on trust and respect.
2- Make eye contact all the time and lead with positive emotions. Include humour without being cynical. Try to learn from them rather than only using the "I" language. Make implications of the "we" community you will start together.
3- Pay attention to their mood in the classroom. Student wellbeing is the key to success. Starting the day with mindfulness activities will give you lots of ideas how they occasionally start the day. Remember not everybody is fortunate to have happy families with rise and shine mood on all the time. Give chances to the students to express how they feel.
4-Get to know your learner types. It is easier to differentiate your activities according to your learner types. It provides you ample strategies to cater for individual needs of the students. For fun activities check this resource The Quantum Learning Network.
5- Make time for non academic discourse. Ask them to teach you new trendy dance moves or ask their private interests during the breaks or lunch time. Keep the communication flowing on daily subjects. Be curious about their life and open the doors to their hidden world inside them.
Sources:https://www.weareteachers.com/rapport-with-students/
https://www.edutopia.org/article/6-ways-build-rapport-students