Soak them in extra virgin olive oil! Do not apply nail polish regularly. Avoid burning or breaking them. Massage them and apply Vasaline to the nail and cuticle every night! Also take the other's advice and don't bite your nails ;)
Well drink lots of water and eat healthy foods, such as fish, vegetables, and fruit. A good diet produces a great body, plus healthy hair, skin, and nails! You could even take a fish oil pill, it has lots of omega three fatty acids, which are crucial to having nice nails!
there is no way to make them grow faster . in reality your nails will grow at the same pace regardless of the remedy or method you choose. If you wish to make them grow LONGER then it is simply a matter of time, health , and hygiene .. good luck