Stress relief and stress burn out.. how do you stop it?

I do too much and I want to know ways to cope with stress. In my volunteer jobs I do, I deal with, basically guys who act like 15 yr olds who are 22-23. I had a prior volunteer job where the boss who was 40-45 acted 10. and threw hissy fits. How do you cope with juvenile behavior and not let it get you physically and emotionally
Stress relief and stress burn out.. how do you stop it?
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