There's "good" stress and "bad" stress, but even the good stress can accumulate too much! I'm currently living a life that resembles a diet consisting entirely of double-fudge chocolate cake- rich and full, delicious and wonderful, but not all that good for you!Sometimes I just wish for a salad and a glass of water!
Singing helps a lot, taking time to take a walk, a bath, or snuggle with a cat and an cup of tea and a good book. Those times are few!
As for spillover stress, I think Bassic is on the right track of letting it flow, and I try to respond with positive energy, which often requires a long pause and several deep breaths before opening my mouth!