★★★★★
Trouble is, depressed people often don't feel like walking.
Force yourself to walk, but if the idea really sucks to you, and makes you miserable thinking about it, try to put a (fake if necessary) smile on face and start counting your blessings - finding things to be grateful about, instead of focusing on the fact that you don't want to take a walk.
I try to notice things while walking -- birds, what the road construction crews are working on, what is making a particular noise, children, trees. This gets me out of my head and away from my troubles, and also prevents me from getting too bored while walking.
Walking daily increases health and happiness, and helps a person to sleep better.
Walking
★★★★★