Sorry to hear about your daughter, I have had both of mine at home from school recently so I understand.
The obvious answer is spend too much time on pc forums, especially this one, read, clean, plan what to do in the new year, tidy, plan what to cook over Christmas and if all else fails there is the pc and a book. I read quite alot of books.
I quite like my own company but if my OH has time on his hands it drives him bonkers. This works ok for me as he is a joiner and the house is being renovated so even as I type he is boxing in the new stairs he fitted last weekend.