Apply your preferred wood polish, following its instructions, to your furniture with a rag. Using the polish at least once a week will protect the wood from glass rings.
Use a tablecloth, table mat or place mats when using wood furniture for a meal or a party, preventing unsightly rings from forming.
Put coasters on wooden furniture in plain sight, readily available to use. Ask guests to place drink glasses on coasters, if they neglect to use them.
Wipe up any water left behind by glasses as soon as possible to prevent glass rings from forming. Move wood furniture out of sunlight, if possible, to further prevent rings from forming.