Worth mentioning these:

Turkey. (or any meat) All meat should be well cooked and always boneless.

Sage Cats are especially sensitive to this herb, it can cause stomach upset and central nervous system depression.

Bread dough. Raw dough could actually rise in your pets sensitive tummy causing discomfort or an even more serious emergency.
Cake batter Raw eggs can cause salmonella infection in your pet, just as it can for anyone in your family. Stick to dog biscuits and kitty treats instead of this sugary concoction.

Too much of anything. Even small tastes of human food could cause stomach pains, diarrhea and even pancreatitis (happened to my dog Ralph) in your pet.

Wrappings. You know how they love to get into those. Dispose of aluminum foil, plastic wrap and wax paper right away. While licking up food left on these wrappings pets can ingest some of the wrapper, leading to intestinal obstructions. Also, look out for tooth picks, skewers and used silverware.

Hot food. When carrying hot food from the stove or to the table, be sure little Fluffy isn't taking that moment to weave through your legs. (Why do they DO that??!)