Frugal gardeners have long known that they can save a few bucks overwintering tender annuals indoors to be used in the garden next spring. Annuals generally live for only one growing season before going to seed and dying, but many of the annuals sold in garden centers in Chicago are actually perennial shrubs and vines in other parts of the world.
You can dig them out of garden beds or containers and pot them up and grow them as houseplants over the winter. These plants include, ornamental peppers, lantana, rex and fibrous begonias, petunias, coleus, geraniums, flowering maples (pictured below), ornamental sweet potato vines, fuchsia, hibiscus, mandevilla, Tradescantia pallida, aka "Purple Queen" and Tradescantia zebrina aka "Wandering Jew".
Even some of your herb garden can be brought indoors to extend your growing season or to just provide some greenery during the winter months. I've successfully overwintered rosemary and basil indoors some years and other years they weren't very forgiving of being allowed to dry out.
The best space to keep your plants is in a window that faces south, if that isn't an option consider adding grow lights to supplement the low light levels we have in the winter.
A few years ago while thrifting I saw an old houseplant book from the 50s and one of the plants inside the book was a Black-Eyed Susan vine. This year I'm going to experiment with overwintering a small Black-Eyed Susan vine I bought on clearance.
See also: Propagating Plants Through Cuttings.