For the body, use corn meal, a loofa sponge and salt. It will moisturize them and help promote nail growth. A good diet and drinking a lot of water helps too. Even flicking your finger tips will help promote nail growth. Warm weather makes your nails grow faster.
Honey is very good.
It has high anti-bacterial properties. It is a good spot treatment. Just dab a little bit of honey on the problem area. Also, strawberries are rich in salicylic acid. Spread it on your face for 10-15 minutes, and then rinse with cool water.