Stress levels are ridiculous these days. I do my thing and get by with rational, forward thinking thoughts. I set goals and achieve them, but circumstances aren't always ideal and shit happens. After any negative event I try to quickly and calmly assess the damage, observe and construct a solution. I don't bullshit and get emotional over it. If I snap for a bit, I snap, but quickly recover - I'm only human and not perfect at abstaining from letting my emotions overwhelm yet (I'm usually cool as a fucking cucumber).
No matter how small or big, I salvage what I can and learn from the situation. Life's going to throw curve balls so you need to know how to hit them or at least not strike out. I just think of that shit as an unexpected learning opportunity. Life's too fucking short to be stressed!