To enlarge upon and supplement @cak‘s great suggestions,
—Watch a bunch of vintage movies, black-and-white classics from the 1940’s and 1950’s, such as Liz Taylor and Bette Davis pictures. Plenty of cheesy options available, too. Accompany them with a good supply of popcorn or make some dip and plow through a platter of carrots and celery—or, of course, a bag of Ruffles.
— Take that walk in a picturesque place, a park or hiking trail or an old part of town or a university campus or whatever you have nearby.
— Get yourself a challenging jigsaw puzzle (but not excessively challenging, like 1000 pieces of snowy branches, unless you’re really into it). I happen to be in love with the wooden jigsaw puzzles you can get here if you can afford to splurge. The “standard” (large) size ones, 450 to 500 pieces, are ideal, if you ask me. (Oops, they’re not shipping any more until January. Is that too late? Well, you can probably buy puzzles at card shops and toy stores as well.)
— Learn a craft: go to Michael’s and browse until you see tools or media that really look like fun to you, whether they’re a hot glue gun and a bunch of wooden bits or beads and wire or felt and glitter or whatever strikes your fancy.
— Bake some things. Cookies, all kinds. You can freeze them in batches of a dozen or so and break them out during the year, or give them to an older relative to stick in her freezer so she can serve homemade cookies when she entertains, especially if baking has become hard for her.
— Volunteer someplace. Usher at a children’s theatre performance. Read to folks in a nursing home. Collect used books for delivery to an institution. There are lots of needs, especially at holiday time.
— Write notes by hand to people you care about, telling them what they mean to you.