Get a poinsettia and display it prominently! There's no more potent visual reminder of the season than the vivid red and green of a classic poinsettia plant. Nowadays there are other colors, too, from peppermint-striped to pure white.
Poinsettias are available nearly everywhere this time of year, from the huge bushel-basket size at your local florist (or Costco!) to the tiny one-bloom pot at the nearby gas station. They also come in every price range, so don't be put off by the cost of the fill-your-unlit-fireplace size if all you want is a top-of-the-kitchen-table model.
Oh, and - they're not really poisonous, neither to humans nor animals.