You sound a lot like me. Since I quit working, I have a hard time leaving the house and doing normal things too. Like the others said, routine helps. As far as going to the store, I used to make the others in my house do it, but now that they're gone, I have to force myself and it gets a little easier each time you do it. Sunlight definitely does help, when I'm in a major depression, if I force myself out on my porch into the sun, I start feeling better and start wanting to do something. Try it. It might help.