Samhain is a special night to celebrate the dead. The spirits of loved ones are able to come back to this plane of existance, briefly, to celebrate with us. Even though it has to do with such a morid topic, there is no morning, instead, there is feasting and rejoicing.
Not all of the dead are nice and happy, that is why the tradition of Jack-o-lanterns was created. The Druids believed that the Jack-o-lanterns would scare away malevolent spirits that might try to do the living harm.
Traditional foods: apples, pumpkin pie, hazelnuts, Cakes for the Dead, corn, cranberry muffins, and breads, ale, and herbal teas
Ritual herbs: acorns, apples, broom, deadly nightshade, dittany, fern, flax, fumitory, heather, mandrake, mullein, oak leaves, sages, and straw
Ritual decorations:jack-o-lanterns, apples, pictures of deceased loved ones, tools of divination, and candles in shapes of cats, skulls, etc...
Incense: apple, heliotrope, mint, pine, nutmeg, and sage
Stones: all black stones especially jet, obsidian, and onyx
Dieties: The Crone aspect of the triple Goddess, Morrigan, Cernunnos, and Osiris
Candle colors: black and orange