Susan, Brooke has some wonderful thoughts and ideas. My husband was my caretaker and he was unbelievable. He would plan field trips for me. Your Mom might not be able to do this to the extent that I could, but you should encourage her to get up everyday and do something. The something should be planned the night before. Maybe take a walk, pull some weeds, any little thing. Put a plan in place and do it. The feeling of accomplishment is unreal and with each one you want to stretch yourself a little farther.
Take care and thinking of you.
Anne.