Of the ones I have personal experience with that actually worked:
Puncture wounds, or deeply embedded slivers. We would grate a raw carrot and place it on the affected area, wrap it and go to sleep, in the morning slivers had been pulled out, and wounds would be well on their way to healing.
It was a cheap, easy remedy that worked wonders.
Oil of Egg
Hernias. A dozen eggs were hardboiled, the yolks crumbled and then heated until almost a tablespoon of oil was extracted. Extremely smelly to make, but again I saw first hand the healing power of this oil. Dabbing a little oil to the hernia several times a day and it started shrinking and totally healed with no surgery required.
Any bad cuts. Holding the wounded area in some kerosene will immediately stop the bleeding.
Ear infection. A slice of raw potato placed on the ear will relieve the pain.
~~~~~A remedy that does not work:
Thought to remove wax build up from ears. To any believers I suggest you try this experiment. Light the candle, but instead of holding it in the ear hold it against your hand or some other surface. Results are exactly the same.