Getting enough light can make a huge difference in how we feel in winter. Do what you can to boost light by pulling open window coverings during the day, adding lamps and candles, and lighting a fire in the fireplace or wood stove if you have one. Or consider decorating with white for a light, bright look — in the Scandinavian countries, white interiors are common, thanks to their ability to amplify light and cheer up homes during those long, cold northern winters.