A couple more random thoughts:

- maybe she's a checklist kind of girl. Depending on what feels like an effort, she could have a checklist of small, obtainable goals for a normal day. So instead of feeling completely pathetic she can see that she has in fact got out of bed (check), gotten dressed (check).... got the mail (check) - done other things that normal people do. Building blocks towards a more normal life.

- it can help making a conscious decision to have a good day (not brilliant, but not awful). Deciding on one positive thing to do, maybe just saying hi to a neighbour. Maybe just part of the day - decide that this morning WILL be one of the good mornings, then just let the afternoon be crappy... Taking hold of small parts of your own time and seeing that you can exert an influence.

this is sort of the way my mind works, anyways.