Eleven
Do something I've never done before. No idea what yet!
Twelve
Check out when the winter meteor showers are and put them on the calendar.
Thirteen
Donate surplus Christmassy things in good time.
Fourteen
Lie in the hammock and look at the Milky Way, even if only for a minute ot two!
Fifteen
Plan menus for visitors well in advance.
Is your list coming along?