Besides rasins and chocolate, what is extremely dangerous for a dog to eat (human foods, i mean)?

For many people, overindulging in holiday goodies may result in a few extra pounds—but the consequences for our animal companions are much greater if they accidentally ingest cookies, candy or baked goods containing chocolate. In any form ranging from one-ounce baking squares to hand-dipped truffles, chocolate contains theobromine and caffeine, both methylxanthines that can cause stimulation of the central nervous system, an increase in heart rate and tremors. Clinical signs—vomiting, diarrhea, seizures, hyperactivity, and increased thirst, urination and heart rate—can be seen with the ingestion of as little as two ounces of baking chocolate by a ten-pound dog.
And while sugar-free sweets may be a healthier choice for you, gum or candies made with xylitol can make your pets ill. Dogs who’ve ingested significant amounts may develop a sudden drop in blood sugar, resulting in depression, loss of coordination and seizures. Data from the ASPCA Animal Poison Control Center (APCC) also appears to point to a link between xylitol ingestion and liver failure in dogs.
Please take care this holiday season to keep all candy out of your pets' reach—and don't let them in the kitchen unsupervised if you’re baking with chocolate. If you suspect your pet may have eaten chocolate or candies containing xylitol, or any other potentially poisonous substance, call your veterinarian or the APCC's emergency hotline at (888) 426-4435 for round-the-clock telephone assistance. For more information on poison prevention, visit APCC online.

Listed below are links to the ASPCA® Animal Poison Control Center's information on some common garden and household plants that can be poisonous to your pet.
This may not represent a complete list of all poisonous plants.
Also, your pet may have a sensitivity or allergy to a plant that is not on the list, resulting in toxicity. Always contact your veterinarian immediately if you think your pet may have ingested a poisonous plant. If you don't find the information you're seeking listed below, click here for our additional sources of information, many including specific effects and plant photos from the various veterinary/horticultural schools.

Special Notice: Several recent reports of dogs having kidney failure after ingesting large amount of grapes or raisins has the ASPCA Animal Poison Control Center investigating to determine the causative agents or disease processes. Click here for information.

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  Bulbs: Amaryllis, Autumn Crocus, Daffodil, Day Lily, Elephant Ears, Gladiolas, Hyacinth, Iris, Lily of the Valley, Narcissus, Orange Day Lily, Tulip
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  Ferns: Aparagus Fern, Australian Nut, Emerald Feather (aka Emerald Fern), Emerald Fern (aka Emerald Feather), Lace Fern, Plumosa Fern
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  Flowering Plants: Cyclamen, Hydrangea, Kalanchoe, Poinsettia
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  Garden Perennials: Charming Diffenbachia, Christmas Rose, Flamingo Plant, Foxglove, Marijuana, Morning Glory, Nightshade, Onion, Tomato Plant, Tropic Snow Dumbcane
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  House Plants: Ceriman (aka Cutleaf Philodendron), Chinese Evergreen, Cordatum, Corn Plant (aka Cornstalk Plant), Cutleaf Philodendron (aka Ceriman), Devil's Ivy, Dumb Cane, Golden Pothos, Green Gold Nephthysis, Marble Queen, Mauna Loa Peace Lily, Nephthytis, Peace Lily, Red-Margined Dracaena, Striped Dracaena, Taro Vine, Warneckei Dracaena
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  Lillies: Asian Lily (liliaceae), Easter Lily, Glory Lily, Japanese Show Lily, Red Lily, Rubrum Lily, Stargazer Lily, Tiger Lily, Wood Lily
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  Shrubs: Cycads, Heavenly Bamboo, Holly, Jerusalem Cherry, Mistletoe "American", Oleander, Precatory Bean, Rhododendron, Saddle Leaf Philodendron, Sago Palm, Tree Philodendron, Yucca
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  Succulents: Aloe (Aloe Vera)
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  Trees: Avocado, Buddist Pine, Chinaberry Tree, Japanese Yew (aka Yew), Lacy Tree, Macadamia Nut, Madagascar Dragon Tree, Queensland Nut, Schefflera, Yew (aka Japanese Yew)
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  Vines: Branching Ivy, English Ivy, European Bittersweet, Glacier Ivy, Hahn's self branching English Ivy, Needlepoint Ivy
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  Misc/Uncategorized: American Bittersweet, Andromeda Japonica, Azalea, Bird of Paradise, Buckeye, Caladium hortulanum, Calla Lily, Castor Bean, Clematis, Fiddle-Leaf Philodendron, Florida Beauty, Fruit Salad Plant, Golden Dieffenbachia, Gold Dust Dracaena, Heartleaf Philodendron, Horsehead Philodendron, Hurricane Plant, Mexican Breadfruit, Mother-in-law, Panda, Philodendron Pertusum, Red Emerald, Red Princess, Ribbon Plant, Satin Pothos, Spotted Dumb Cane, Sweetheart Ivy, Swiss Cheese Plant, Variable Dieffenbachia, Variegated Philodendron, Yesterday/Today/Tomorrow

Thanks to
http://www.dogpack.com/health/poisonplants.htm