It depends on the level of stress and reason. If I'm angry, I walk or go out in the garden and do some heavy landscaping. If I'm going through long term stress because one of my cats is very ill, I drink gallons of tea, eat dark chocolate (so I don't eat too much) and cuddle the cats. If I'm trying to work through a stressful problem, usually something financial or a problem at work, then I prune - I love pruning!