How can I help someone to be happier?

I have a friend in her 70s who is sad, alone and sounding more depressed much like the song http://www.youtube.com/watch?v=mci1xkJWIu4&feature=fvstI I don’t live close by. What can I do to help her. I’ve tried to encourage her to move into a senior citizen community where she’d have other people to interact with. She has been estranged from her family for many years.