If you opt for a traditional head table, that is,your bridesmaids and groomsman sit at a long straight table with you, please keep etiquette in mind. The maid/matron of honor sits next to the groom, while the best man sits next to the bride. It should alternate boy/girl from there.
SIDE NOTE: Consider breaking tradition with some fun twists on the head table. Some brides and grooms will sit alone at a sweetheart table, or alone with their maid of honor and best man. Let your bridal party sit with their families or guests. Or share the experience with your immediate family by sitting at a round table with your parents and closests relatives.