Trading is a stressful activity, there is no doubt about that.
Everyone and every profession is stressful.
But I think what is more important, is a person's ability to mitigate and minimize and control and handle stress in a healthy, controlled, fashion. Some people kick walls and chairs or throw things or yell...you don't want that to be you. You want healthy, normal, outlets of tension and stress relief.
Coffee, caffeine, irregular sleep patterns, junk food, alcohol, all will only increase your stress levels and coping skills.
I know it sounds cliche, but you should really eat healthy foods. and eliminate junk foods, completely. Don't overeat.
Walk, run, jog or bike and lift some moderate weights consistently regularly, and stretch and breathe too.
Sip caffeine-free teas.
Don't binge watch bs movies and tv shows and music. Don't fill your mind with noise, hype, nonsense, poison and clutter.
There's a neighborhood Calico cat that crosses my room window several times a week. Just seeing it's face, eyes, and coat...makes me smile, and calms me.