Your sideboard can be used in any way your heart desires, but it is traditionally used in the dining room as extra storage space and surface space for serving food, buffet-style. Sideboards can be used to store table linens, extra cutlery, plates and serving dishes. When it’s not in the dining room, its storage spaces can be used for extra blankets, pillows, candles, cookbooks and other decor pieces when they’re not in use. Using the surface space for home decor items is also a common use of a sideboard.