Keep these points in mind and you'll cope far better
Don't get stressed by the job. Remember that you are merely the latest in a long line of farang teachers who have come and gone. There isn't enough time to make any real progress with students' English so just try and make it fun for them.
From using humor and surprise to employing reward structures
Boredom grows from predictability. An occasional taste of the unexpected will make everyone's learning experience more enjoyable.