1. Keep them out of the water <br />When cleaning the dishes or even swimming, the water softens the nail and make it more breakable. <br />2. File them right <br />First start by clipping. Then file your nails using a fine-grit cushion, not metal. Always file in one direction, it's the key to healthy nails. <br />3. Take Biotin (vitamin B8 or B7) supplements <br />It's the only vitamin proven by scientists to strengthen nails and hair. <br />4. Five days on, five days off rule <br />Take a break from nail polish, gel or acrylic. Five days on, five days off. Your nails will thank you. <br />5. At-home nail treatments <br />Make your own nail treatment regularly. For yellow nails, mix lemon juice and baking soda. Rub on nails. For dry nails, dip the nails in olive oil. <br />6. Visit the dermatologist <br />If your nails are still brittle, visit your dermatologist. He'll find other products and solutions.