How do you clam yourself down when you are depressed or stressed?

It depends on the level of stress or depression. If it is something that is really heavy for me, I let myself drown in it--acknowleding the feeling and then after that I try to detach. And by detaching means that I usually try to divert my attention to doing some household work or helping others. I try to get busy all the more so that I can distract myself from the negative emotions that I am feeling. And after that, I simply just sleep on it.