Some people bake when they're feeling down. I make soup.
I imagine that I do this for the same reasons that others bake. You follow a familiar process. It takes some time and energy, but not too much of either. It provides you with something motivational that isn't too strenuous. It fills your home with great aromas. When you're done, not only have you accomplished something, but you get to eat it.
Hmmm... if I baked instead, I could be having pie soon.