There are many myths about what human foods are safe for dogs, however we must understand how a dog's digestive system works in order to ensure we're not slowly poisoning or making our dogs sick. This list seems to cover most human foods that are dog-safe, however in my personal opinion and from the research I have done I don't agree with blueberries, kiwi or any fruit that can have the dog ingest SEEDS. Seeds are lethal for dogs, so even with apples, make sure your dog does not eat seeds.
That brings me to peanut butter, for the most part it's great for dogs. However, some brands use xylitol in their peanut butter which is incredibly lethal for our pooches.
Read more about Xylitol and other toxic foods for your dog here